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SQL Aggregation queries using Group By, Sum, Count and Having
 
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From SQL Queries Joes 2 Pros (Vol2) ch4.1. Learn up to write aggregated queries.
Views: 168782 Joes2Pros SQL Trainings
Oracle Database Tutorial - SELECT Operators - DECODE, CASE, NVL, NVL2, SUM, COUNT etc
 
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This video tutorial on Oracle database provides detailed information on various operators used in SELECT statements. You can visit Oracle Database related videos here : https://www.youtube.com/watch?v=cDqlT7O8H0Q&list=PLRt-r4QiDOMfMmVU-8145pLcBxIdvAt8f&index=1 Website: http://guru4technoworld.wix.com/technoguru Facebook : https://www.facebook.com/a2zoftech/ Blog: http://dronatechnoworld.blogspot.com
Views: 82 Sandip M
TUTORIAL-3 Select, functions like min, max, count, sum, avg in oracle database
 
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select, functions like min, max, count, sum, avg in oracle database. Demonstration of working on a table and data in it. Please like and subscribe us.
Views: 72 Let's Learn Pro
SQL with Oracle 10g XE - Using the COUNT and SUM Functions
 
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In this video I use the COUNT and SUM functions available to the SQL language. I used the COUNT function to add up the number of records in my query. This function works well with all data types and will just count the number or records that result from the conditions of your query. The SUM function will add up the numeric values and produce a total amount of a column. When using a function be sure to use parenthesis around the column you are performing the function on. This video is part of a series of videos with the purpose of learning the SQL language. For more information visit Lecture Snippets at http://lecturesnippets.com.
Views: 7756 Lecture Snippets
SQL Distinct and Multiple Columns
 
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Jamie King of Neumont University showing how SQL DISTINCT varies when multiple columns are present in the result set.
Views: 18730 Jamie King
Oracle Database11g tutorials 11: SQL case manipulation function in Oracle Database
 
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Part 2 SQL functions- character function -case manipulation functions Previous Video Link :: http://youtu.be/5rx8Q4x4-qI Tool used in this tutorial is command prompt. This tutorial series is part of SQL expert exam certification training. if you are preparing for SQL certification you can use my tutorials. This SQL Tutorial is a part of free training. Copy Cloud referral link || Use this link to join copy cloud and get 20GB of free storage https://copy.com?r=j7eYO7 Contacts E-Mail [email protected] Twitter https://twitter.com/rebellionrider Instagram http://instagram.com/rebellionrider Facebook. https://www.facebook.com/imthebhardwaj Linkedin. http://in.linkedin.com/in/mannbhardwaj/ Thanks for linking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ------------------------------------------------------------------------------------- As discuss in last video we have 3 case manipulation functions. In case you miss the SQL functions intro video you can find the link in the description below. First let's see what these functions are. Upper (): This function takes a parameter converts it into uppercase and returns the new string. Initcap (): this function also takes parameter and converts the initial letter of or parameter into uppercase and returns the new string. Lower (): This function takes a parameter converts it into lowercase and returns the new string. Ok let's do some practical For this practical we will be using 2 tables First is dual table Which is a dummy table provided by oracle? And I have created another table again by the name of example. This will be our second table. Let's start with SQL function upper ( ); SELECT upper('hello world') FROM dual; As you can see I have used "hello world" completely in lowercase as parameter to SQL upper function. Execute it. Here, our result has given us a completely new hello world string which is in uppercase. Similarly you can also use SQL upper function to perform other DML Let's try This time we will work on our second table EXAMPLE; insert into example values (upper('manish')); first parentheses for values and second for SQL function upper. Let's check the result. As you can see here inserted value is in upper case. Lets compare it with simple insert query Insert into example values ('manish'); Execute it, i think now it's clear that when we perform simple insert DML the inserted value will be the same you provide. Similarly let's try SQL function initcap(); SELECT initcap('hello world') FROM dual; As you see here in result the initial letters of string hello world are in uppercase. Let's do the insert query insert into example values (initcap('hello world')); initial letters of string also are in uppercase. Let's try SQL function lower(); This time we have to write our hello world in all caps. SELECT lower('HELLO WORLD') FROM dual; Execute String totally in lower case. Similarly you can user SQL function lower in other DML like insert and all.
Views: 85630 Manish Sharma
04 MySQL Tutorial for Beginners: USE, SELECT, result set, DISTINCT, ALL
 
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In this video you will begin to code your first "SQL statements" in MySQL Workbench. The very first thing you need to do is to choose and select a database. The "USE statement" is the one you’re going to need for this purpose, and it's the very first statement you're going to learn. The second statement you're going to learn is the "SELECT statement" which is used to retrieve data from a base table. You code the SELECT keyword followed by a list of column names separated by commas and the FROM keyword followed by the name of the base table from which the query retrieves the data. A "result set" is a table of data resulted from a statement: you can think of it as a temporary table that's created within a database. Note that when you execute a USE statement alone, you do not get any results back, because a USE statement itself does not expect to have any results back. In the SELECT clause, you can code an asterisk as a shorthand to indicate that all of the rows and columns should be retrieved. By default, all of the rows in the base table are included in the result set. In some cases, that means that the result set will contain duplicate rows, or rows whose column values are identical. If that's not what you want, you can include the DISTINCT keyword in the SELECT clause to eliminate the duplicate rows. The DISTINCT keyword prevents duplicate rows from being included in the result set. The ALL keyword causes all rows matching the search condition to be included in the result set, regardless of whether rows are duplicated. The ALL keyword is the default and can therefore be omitted. EXERCISES for your SELF-TRAINING: http://golearnfast.com/Quizzes.php?_SelectSmallerGroup_279=0&Lessons_ID=279 SCRIPT FOR THE EXAMPLES: http://www.golearnfast.com/files/lessons_material/lesson_277_1440544998.sql SUBSCRIBE! https://www.youtube.com/channel/UCMEaGDoHU7c9tWyafZ9vC6Q?sub_confirmation=1 FACEBOOK https://www.facebook.com/golearnfast GOOGLE+ https://plus.google.com/u/0/b/101326338689489366802/
Views: 6765 golearnfast
COUNTIF - How to count the number of occurrences of a specific word in Excel
 
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Oracle Excel will show you how COUNTIF works which allows you to count the number of times a specific word or text appears in a range of cells in Excel
Views: 45 Oracle Excel
SQL Date Comparison - How to filter Datetime in SQL Server - SQL Training Online
 
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http://www.sqltrainingonline.com SQL Date Comparison - How to filter Datetime in SQL Server - SQL Training Online In this video, I show you how to do a SQL Date Comparison in SQL Server when your Datetime has an actual time in it. I also include the latest trick that will make this easier if you are using SQL Server 2008 or SQL Server 2012. How do you compare a Datetime in SQL Server? A SQL Datetime stores both Date and Time. So when you are filtering using the SQL Where clause, you have to know if you Datetime is storing the time also. Let's take a look at the employee table in SQL Training Online Simple DB The column we are looking at is the hire date. I want to go after the person who was hired on February, 22 2005. So, I use the following SQL. select * from employee where hire_date='02/22/2005' Now, this works because we don't have any times stored in this column. But, if I change the record from 2005-02-22 00:00:00.000 to 2005-02-22 08:22:25.000 and rerun the query, you see that I don't get any results. That is because the value of 02/22/2005 is really 2005-02-22 00:00:00.000 and I just changed the hire_date to include a time other than 00:00:00.000. So, I have to tweak my query to use a greater than and less than sign. This works. But, to really understand what is going on, let me show you what SQL Server really sees. There are other ways, and in this StackOverflow article you can read more about these other ways. But, I want to point out a few. If you are working in SQL Server 2005 or earlier, the following is supposed to be the fastest performing way to do this. select datediff(dd,0, hire_date),* from employee where dateadd(dd,0, datediff(dd,0, hire_date)) = '2005-02-22' But, if you are working in SQL Server 2008 or SQL Server 2012, they have introduced an actual Date datatype that doesn't include the Time portion. Since this is the case, you can use the CAST function to remove the time from the Datetime. Here is the SQL to do that. select * from employee where CAST(hire_date AS Date) = '2005-02-22' And that's it. If you enjoy the video, please give it a like, comment, or subscribe to my channel. You can visit me at any of the following: SQL Training Online: http://www.sqltrainingonline.com Twitter: http://www.twitter.com/sql_by_joey Google+: https://plus.google.com/#100925239624117719658/posts LinkedIn: http://www.linkedin.com/in/joeyblue Facebook: http://www.facebook.com/sqltrainingonline
Views: 28348 Joey Blue
Sql query to select all names that start with a given letter without like operator
 
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Text Article http://csharp-video-tutorials.blogspot.com/2017/01/sql-query-to-select-all-names-that.html Slides http://csharp-video-tutorials.blogspot.com/2017/01/sql-query-to-select-all-names-that_31.html SQL Server Interview Questions and Answers text articles & slides http://csharp-video-tutorials.blogspot.com/2014/05/sql-server-interview-questions-and.html SQL Server Interview Questions and Answers playlist https://www.youtube.com/playlist?list=PL6n9fhu94yhXcztdLO7i6mdyaegC8CJwR All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this video we will discuss writing a SQL query to retrieve all student names that start with letter 'M' without using the LIKE operator. If the interviewer has not mentioned not to use LIKE operator, we would have written the query using the LIKE operator as shown below. SELECT * FROM Students WHERE Name LIKE 'M%' We can use any one of the following 3 SQL Server functions, to achieve exactly the same thing. CHARINDEX LEFT SUBSTRING The following 3 queries retrieve all student rows whose Name starts with letter 'M'. Notice none of the queries are using the LIKE operator. SELECT * FROM Students WHERE CHARINDEX('M',Name) = 1 SELECT * FROM Students WHERE LEFT(Name, 1) = 'M' SELECT * FROM Students WHERE SUBSTRING(Name, 1, 1) = 'M'
Views: 56615 kudvenkat
SQL CASE
 
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Jamie King of Neumont University demonstrating CASE.
Views: 29765 Jamie King
HAVING clause and difference with GROUP BY & WHERE clause in SQL statement
 
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Using HAVING clause and difference with GROUP BY & WHERE clause in SQL statement Link for scripts on my blog: https://sqlwithmanoj.com/2015/05/23/sql-basics-difference-between-where-group-by-and-having-clause/ Check the whole "SQL Server Basics" series here: https://www.youtube.com/playlist?list=PLU9JMEzjCv14f3cWDhubPaddxRvx1reKR Check my SQL blog at: http://sqlwithmanoj.com/ Check my SQL FB Page at: https://www.facebook.com/sqlwithmanoj
Views: 62707 SQL with Manoj
Over clause in SQL Server
 
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over partition by in sql server 2008 sql server over clause partition partition by clause in sql server 2008 over partition by clause in sql In this video we will discuss the power and use of Over clause in SQL Server. The OVER clause combined with PARTITION BY is used to break up data into partitions. Syntax : function (...) OVER (PARTITION BY col1, Col2, ...) The specified function operates for each partition. For example : COUNT(Gender) OVER (PARTITION BY Gender) will partition the data by GENDER i.e there will 2 partitions (Male and Female) and then the COUNT() function is applied over each partition. Any of the following functions can be used. Please note this is not the complete list. COUNT(), AVG(), SUM(), MIN(), MAX(), ROW_NUMBER(), RANK(), DENSE_RANK() etc. Example : SQl Script to create Employees table Create Table Employees ( Id int primary key, Name nvarchar(50), Gender nvarchar(10), Salary int ) Go Insert Into Employees Values (1, 'Mark', 'Male', 5000) Insert Into Employees Values (2, 'John', 'Male', 4500) Insert Into Employees Values (3, 'Pam', 'Female', 5500) Insert Into Employees Values (4, 'Sara', 'Female', 4000) Insert Into Employees Values (5, 'Todd', 'Male', 3500) Insert Into Employees Values (6, 'Mary', 'Female', 5000) Insert Into Employees Values (7, 'Ben', 'Male', 6500) Insert Into Employees Values (8, 'Jodi', 'Female', 7000) Insert Into Employees Values (9, 'Tom', 'Male', 5500) Insert Into Employees Values (10, 'Ron', 'Male', 5000) Go Write a query to retrieve total count of employees by Gender. Also in the result we want Average, Minimum and Maximum salary by Gender. This can be very easily achieved using a simple GROUP BY query as show below. SELECT Gender, COUNT(*) AS GenderTotal, AVG(Salary) AS AvgSal, MIN(Salary) AS MinSal, MAX(Salary) AS MaxSal FROM Employees GROUP BY Gender What if we want non-aggregated values (like employee Name and Salary) in result set along with aggregated values You cannot include non-aggregated columns in the GROUP BY query. SELECT Name, Salary, Gender, COUNT(*) AS GenderTotal, AVG(Salary) AS AvgSal, MIN(Salary) AS MinSal, MAX(Salary) AS MaxSal FROM Employees GROUP BY Gender The above query will result in the following error : Column 'Employees.Name' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause One way to achieve this is by including the aggregations in a subquery and then JOINING it with the main query as shown in the example below. Look at the amount of T-SQL code we have to write. SELECT Name, Salary, Employees.Gender, Genders.GenderTotals, Genders.AvgSal, Genders.MinSal, Genders.MaxSal FROM Employees INNER JOIN (SELECT Gender, COUNT(*) AS GenderTotals, AVG(Salary) AS AvgSal, MIN(Salary) AS MinSal, MAX(Salary) AS MaxSal FROM Employees GROUP BY Gender) AS Genders ON Genders.Gender = Employees.Gender Better way of doing this is by using the OVER clause combined with PARTITION BY SELECT Name, Salary, Gender, COUNT(Gender) OVER(PARTITION BY Gender) AS GenderTotals, AVG(Salary) OVER(PARTITION BY Gender) AS AvgSal, MIN(Salary) OVER(PARTITION BY Gender) AS MinSal, MAX(Salary) OVER(PARTITION BY Gender) AS MaxSal FROM Employees Text version of the video http://csharp-video-tutorials.blogspot.com/2015/09/over-clause-in-sql-server.html Slides http://csharp-video-tutorials.blogspot.com/2015/09/over-clause-in-sql-server_29.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 84618 kudvenkat
Get Table Names with Column Names and Data Types in SQL Server - SQL Server Tutorial
 
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In this video ,we will generate the script that will return us all the table names with column names and data type of those columns. We often need this information. Let's say we are going to prepare mapping document for load the data from Source Database to Destination database. We can get the list of all tables with column names and data types from Source Database and Destination Database and then paste in Excel and map the required input columns to output columns for ETL Process. Blog link with scripts used in video http://sqlage.blogspot.com/2015/02/get-all-tables-with-column-names-and.html
Views: 46218 TechBrothersIT
SQL, count function, lesson 19
 
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SQL count function
Views: 8622 hammadshams
Oracle Sql SELECT statement & Drl command ,where clause, Arithmetic Expressions
 
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SQL Where clause with example on Oracle 11g Database -Oracle Sql Arabic Course Basic SELECT statement & Arithmetic Expressions اوراكل ديفيلوبر SQL tutorial 49: CASE - Simple Case Expression in Oracle Database The WHERE Clause: Case Sensitivity and Collations ORACLE 11g Course Details - Using TOAD (Tool For Oracle Application Development) in training ... Clause; Comparison and conditional operations; Arithmetic and logical operations ... Using group by and having clause of DRL statement ... Understanding the practical approach to sub queries/nested select/sub select/inner ... SQL Editor commands Oracle 12C /Oracle12C-Wilson.asp About SQL&SQL*PLUS; Constraints; Normalization and De-Normalization; ER Diagrams ... Working with DML, DRL Commands; Operators Support. DML-Insert, update, delete; DQL-SELECT Statements using WHERE clause; Comparison and Conditional Operators; Arithmetic and Logical Operators; Set Operators (UNION, ... [PDF]Oracle SQL(Structured Query Language) www.isashitsolution.com/pdf/ORACLE.pdf. Oracle. SQL(Structured Query Language) ... Working with DML, DRL Commands. • Operators Support. Build In Function. • Arithmetic Functions, Character Functions, ... Grouping the Result of a Query. • Using Group by and Having Clause of DRL. Statement ... Using VIEWS for DML Operations. SQL select statement and functions - Nov 20, 2013 - SQL Statements ... SQL as the standard language Oracle SQL complies with ... SQL Statements DRL - Retrieves data from the database DML ... If any column value in an arithmetic expression is null, the result is null. .... The DUAL table is generally used for SELECT clause syntax ... [PDF]SQL Basics & PL-SQL - SQL School sqlschool.com/downloads/PLSQL-Training-SQLSchool.pdf SQL Basics & Oracle PL/SQL Developer Training. All Our Training ... COMMANDS. ✓ Structured Query Language (SQL) Basics ... Returning into clause, Bulk Collect. ✓ For All ... Recycle Bin, Regular Expressions in PLSQL ... DML Command DRL Commands Operators. ✓ INSERT ... Arithmetic and Logical Operators. Operators in SQL.... - PL/SQL-Developer plsql/2011/10/operators-in-sql.html Oct 26, 2011 - If we select the data using select statement from dual ... Arithmetic Operators are used to perform arithmetic operations on numeric ... This is the syntax for using the IN operator. ... Unlike In condition where we will match selective multiple values, we will match .... SQL Statements Part3 (DRL,TCL and DCL). learn oracle - Curly Brackets learn-oracle/ Oracle Pre Defined Data types; DDL Commands; Create, Alter (add, modify, rename, ... Arithmetic Functions, Character Functions, Date Functions, Conversion ... a Query. Using Group by and Having Clause of DRL Statement; Using Order by clause ... Understanding the practical approach to Sub Queries/Nested Select/Sub ... Oracle PL-SQL - SequelGate oracle-plsql-training.html Arithmetic Functions; Character Functions; Date functions; Conversion Functions ... Using Group by and Having Clause of DRL Statement; Using Order by clause ... CASE expression of Select Command, Temporary Tables/Global Tables; New ... : DRL, DDL, DML, TCL and DCL commands /2014/12/drl-ddl-dml-tcl-and-dcl-commands.html DRL, DDL, DML, TCL and DCL commands. DRL (Data Retrieval Language):. Select. DDL (Data Definition Language):. Create. Alter. Drop. Truncate. Missing: expressions SQL Count - Wikitechy https://www.wikitechy.com/tutorials/sql/sql-count Tags : sql tutorial , pl sql tutorial , mysql tutorial , oracle tutorial , learn sql , sql server tutorial. Syntax ... expression can be a column name, an arithmetic operation, or a star . ... In addition to the COUNT function in the SELECT statement. In those cases, these columns need to be part of the GROUP BY clause as well
Views: 41 Muo sigma classes
SQL Inner Join Multiple Tables with SUM Tutorial - SQL 2008/2012/2016/2017
 
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Use inner joins with multiple tables to create reports. Uses aliases, and the SUM aggregate function to demonstrate the flexibility of the join statement. Get the SQL script to create the database and run the exercies in the video here: https://www.qewbi.com/sql/scripts/qewbijoins.zip
Views: 135777 Edward Kench
PL/SQL tutorial 9: IF THEN ELSE (IF-ELSE) Statement in PL/SQL by Manish Sharma
 
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3rd tutorial in the series explaining IF-THEN-ELSE statement in Oracle PL/SQL with Example. Enjoy ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog : http://bit.ly/if-then-else Previous Tutorial ► IF THEN Statement https://youtu.be/IWvuFD6eD30 ------------------------------------------------------------------------- ►►►Let's Get Free Uber Cab◄◄◄ Use Referral Code UberRebellionRider and get $20 free for your first ride. ------------------------------------------------------------------------- ►►►Help Me In Getting A Job◄◄◄ ►Help Me In Getting A Good Job By Connecting With Me on My LinkedIn and Endorsing My Skills. All My Contact Info is Down Below. You Can Also Refer Me To Your Company Thanks ------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider https://www.facebook.com/imthebhardwaj http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ http://rebellionrider.tumblr.com/ http://www.pinterest.com/rebellionrider/ You can also Email me at for E-mail address please check About section Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 61044 Manish Sharma
SQL Tip: Be Wary of SELECT COUNT
 
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In this video, we show why you should be wary of using SELECT COUNT(*). The video was inspired by a blog post by Lukas Eder at http://blog.jooq.org/2014/08/08/sql-tip-of-the-day-be-wary-of-select-count/.
Views: 514 Webucator
IIF function in SQL Server
 
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iif function in sql server 2012 iif function in sql server example sql server iif function example In this video we will discuss IIF function in SQL Server. IIF function Introduced in SQL Server 2012 Returns one of two the values, depending on whether the Boolean expression evaluates to true or false IIF is a shorthand way for writing a CASE expression Syntax : IIF ( boolean_expression, true_value, false_value ) Example : Returns Male as the boolean expression evaluates to TRUE DECLARE @Gender INT SET @Gender = 1 SELECT IIF( @Gender = 1, 'Male', 'Femlae') AS Gender Example : Using IIF() function with table data. We will use the following Employees table for this example. SQL Script to create Employees table Create table Employees ( Id int primary key identity, Name nvarchar(10), GenderId int ) Go Insert into Employees values ('Mark', 1) Insert into Employees values ('John', 1) Insert into Employees values ('Amy', 2) Insert into Employees values ('Ben', 1) Insert into Employees values ('Sara', 2) Insert into Employees values ('David', 1) Go Write a query to display Gender along with employee Name and GenderId. We can achieve this either by using CASE or IIF. Using CASE statement SELECT Name, GenderId, CASE WHEN GenderId = 1 THEN 'Male' ELSE 'Female' END AS Gender FROM Employees Using IIF function SELECT Name, GenderId, IIF(GenderId = 1, 'Male', 'Female') AS Gender FROM Employees Text version of the video http://csharp-video-tutorials.blogspot.com/2015/10/iif-function-in-sql-server.html Slides http://csharp-video-tutorials.blogspot.com/2015/10/iif-function-in-sql-server_14.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 32355 kudvenkat
PL/SQL tutorial 3: SELECT INTO statement in PL/SQL by Manish Sharma RebellionRider
 
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How to initialize the variable by fetching values from the table of the database or by using SELECT INTO statement in PL/SQL by Manish Sharma RebellionRider ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog : http://bit.ly/select-into-statement-pl-sql Previous Tutorial ► Variables: https://youtu.be/2MNmodawvnE ------------------------------------------------------------------------- ►►►Let's Get Free Uber Cab◄◄◄ Use Referral Code UberRebellionRider and get $20 free for your first ride. -------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider https://www.facebook.com/imthebhardwaj http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ http://rebellionrider.tumblr.com/ http://www.pinterest.com/rebellionrider/ You can also Email me at for E-mail address please check About section Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 119422 Manish Sharma
Part 1   How to find nth highest salary in sql
 
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Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/05/part-1-how-to-find-nth-highest-salary_17.html This is a very common SQL Server Interview Question. There are several ways of finding the nth highest salary. By the end of this video, we will be able to answer all the following questions as well. How to find nth highest salary in SQL Server using a Sub-Query How to find nth highest salary in SQL Server using a CTE How to find the 2nd, 3rd or 15th highest salary Let's use the following Employees table for this demo Use the following script to create Employees table Create table Employees ( ID int primary key identity, FirstName nvarchar(50), LastName nvarchar(50), Gender nvarchar(50), Salary int ) GO Insert into Employees values ('Ben', 'Hoskins', 'Male', 70000) Insert into Employees values ('Mark', 'Hastings', 'Male', 60000) Insert into Employees values ('Steve', 'Pound', 'Male', 45000) Insert into Employees values ('Ben', 'Hoskins', 'Male', 70000) Insert into Employees values ('Philip', 'Hastings', 'Male', 45000) Insert into Employees values ('Mary', 'Lambeth', 'Female', 30000) Insert into Employees values ('Valarie', 'Vikings', 'Female', 35000) Insert into Employees values ('John', 'Stanmore', 'Male', 80000) GO To find the highest salary it is straight forward. We can simply use the Max() function as shown below. Select Max(Salary) from Employees To get the second highest salary use a sub query along with Max() function as shown below. Select Max(Salary) from Employees where Salary [ (Select Max(Salary) from Employees) To find nth highest salary using Sub-Query SELECT TOP 1 SALARY FROM ( SELECT DISTINCT TOP N SALARY FROM EMPLOYEES ORDER BY SALARY DESC ) RESULT ORDER BY SALARY To find nth highest salary using CTE WITH RESULT AS ( SELECT SALARY, DENSE_RANK() OVER (ORDER BY SALARY DESC) AS DENSERANK FROM EMPLOYEES ) SELECT TOP 1 SALARY FROM RESULT WHERE DENSERANK = N To find 2nd highest salary we can use any of the above queries. Simple replace N with 2. Similarly, to find 3rd highest salary, simple replace N with 3. Please Note: On many of the websites, you may have seen that, the following query can be used to get the nth highest salary. The below query will only work if there are no duplicates. WITH RESULT AS ( SELECT SALARY, ROW_NUMBER() OVER (ORDER BY SALARY DESC) AS ROWNUMBER FROM EMPLOYEES ) SELECT SALARY FROM RESULT WHERE ROWNUMBER = 3
Views: 883355 kudvenkat
Dynamic sql output parameter
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2017/05/dynamic-sql-output-parameter.html Slides http://csharp-video-tutorials.blogspot.com/2017/05/dynamic-sql-output-parameter_8.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All SQL Server Tutorial Videos https://www.youtube.com/playlist?list=PL08903FB7ACA1C2FB All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this video we will discuss, how to use output parameters with dynamic sql. Let us understand this with an example. SQL script to create Employees table Create table Employees ( ID int primary key identity, FirstName nvarchar(50), LastName nvarchar(50), Gender nvarchar(50), Salary int ) Go Insert into Employees values ('Mark', 'Hastings', 'Male', 60000) Insert into Employees values ('Steve', 'Pound', 'Male', 45000) Insert into Employees values ('Ben', 'Hoskins', 'Male', 70000) Insert into Employees values ('Philip', 'Hastings', 'Male', 45000) Insert into Employees values ('Mary', 'Lambeth', 'Female', 30000) Insert into Employees values ('Valarie', 'Vikings', 'Female', 35000) Insert into Employees values ('John', 'Stanmore', 'Male', 80000) Go We want to write a dynamic sql statement that returns total number of male of female employees. If the gender value is specified as "Male", then the query should return total male employees. Along the same lines, if the the value for gender is "Female", then we should get total number of female employees. The following dynamic sql, will give us what we want. In this case, the query returns total number of "Male" employees. If you want the total number of female employees, simply set @gender='Female'. Declare @sql nvarchar(max) Declare @gender nvarchar(10) Set @gender = 'Male' Set @sql = 'Select Count(*) from Employees where [email protected]' Execute sp_executesql @sql, N'@gender nvarchar(10)', @gender At the moment we are not using output parameters. If you want the count of employees to be returned using an OUTPUT parameter, then we have to do a slight modification to the query as shown below. The key here is to use the OUTPUT keyword in your dynamic sql. This is very similar to using OUTPUT parameters with a stored procedure. Declare @sql nvarchar(max) Declare @gender nvarchar(10) Declare @count int Set @gender = 'Male' Set @sql = 'Select @count = Count(*) from Employees where [email protected]' Execute sp_executesql @sql, N'@gender nvarchar(10), @count int OUTPUT', @gender, @count OUTPUT Select @count The OUTPUT parameter returns NULL, if you forget to use OUTPUT keyword.. The following query returns NULL, as we removed the OUTPUT keyword from @count parameter Declare @sql nvarchar(max) Declare @gender nvarchar(10) Declare @count int Set @gender = 'Male' Set @sql = 'Select @count = Count(*) from Employees where [email protected]' Execute sp_executesql @sql, N'@gender nvarchar(10), @count int OUTPUT', @gender, @count Select @count
Views: 15071 kudvenkat
Part 8   SQL Query to find department with highest number of employees
 
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Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/06/part-8-sql-query-to-find-department.html Scenario asked in the SQL Server Interview Based on the above two tables write a SQL Query to get the name of the Department that has got the maximum number of Employees. To answer this question it will be helpful if you the knowledge of JOINS & GROUP BY in SQL Server. We discusses these in Parts 11 & 12 of SQL Server Tutorial video series. SQL query that retrieves the department name with maximum number of employees SELECT TOP 1 DepartmentName FROM Employees JOIN Departments ON Employees.DepartmentID = Departments.DepartmentID GROUP BY DepartmentName ORDER BY COUNT(*) DESC Scenario asked in the SQL Server Interview Based on the above two tables write a SQL Query to get the name of the Department that has got the maximum number of Employees. To answer this question it will be helpful if you the knowledge of JOINS & GROUP BY in SQL Server. We discusses these in Parts 11 & 12 of SQL Server Tutorial video series. SQL query that retrieves the department name with maximum number of employees SELECT TOP 1 DepartmentName FROM Employees JOIN Departments ON Employees.DepartmentID = Departments.DepartmentID GROUP BY DepartmentName ORDER BY COUNT(*) DESC
Views: 117899 kudvenkat
Learn Oracle | Using Logical Operators in the WHERE Clause of the Select Statement
 
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Pebbles present, Learn Oracle 10g with Step By Step Video Tutorials. Learn Oracle 10g Tutorial series contains the following videos : Learn Oracle - History of Oracle Learn Oracle - What is Oracle - Why do we need Oracle Learn Oracle - What is a Database Learn Oracle - What is Grid Computing Learn Oracle - What is Normalization Learn Oracle - What is ORDBMS Learn Oracle - What is RDBMS Learn Oracle - Alias Names, Concatenation, Distinct Keyword Learn Oracle - Controlling and Managing User Access (Data Control Language) Learn Oracle - Introduction to SQL Learn Oracle - Oracle 10g New Data Types Learn Oracle - How to Alter a Table using SQL Learn Oracle - How to Create a Package in PL SQL Learn Oracle - How to Create a Report in SQL Plus Learn Oracle - How to Create a Table using SQL - Not Null, Unique Key, Primary Key Learn Oracle - How to Create a Table using SQL Learn Oracle - How to Create a Trigger in PL SQL Learn Oracle - How to Delete Data from a Table using SQL Learn Oracle - How to Drop and Truncate a Table using SQL Learn Oracle - How to Insert Data in a Table using SQL Learn Oracle - How to open ISQL Plus for the first time Learn Oracle - How to Open SQL Plus for the First Time Learn Oracle - How to Update a Table using SQL Learn Oracle - How to use Aggregate Functions in SQL Learn Oracle - How to use Functions in PL SQL Learn Oracle - How to use Group By, Having Clause in SQL Learn Oracle - How to Use Joins, Cross Join, Cartesian Product in SQL Learn Oracle - How to use Outer Joins (Left, Right, Full) in SQL Learn Oracle - How to use the Character Functions, Date Functions in SQL Learn Oracle - How to use the Merge Statement in SQL Learn Oracle - How to use the ORDER BY Clause with the Select Statement Learn Oracle - How to use the SELECT Statement Learn Oracle - How to use the Transactional Control Statements in SQL Learn Oracle - How to use PL SQL Learn Oracle - Data Types in PL SQL Learn Oracle - Exception Handling in PL SQL Learn Oracle - PL SQL Conditional Logics Learn Oracle - PL SQL Cursor Types - Explicit Cursor, Implicit Cursor Learn Oracle - PL SQL Loops Learn Oracle - Procedure Creation in PL SQL Learn Oracle - Select Statement with WHERE Cause Learn Oracle - SQL Operators and their Precedence Learn Oracle - Using Case Function, Decode Function in SQL Learn Oracle - Using Logical Operators in the WHERE Clause of the Select Statement Learn Oracle - Using Rollup Function, Cube Function Learn Oracle - Using Set Operators in SQL Learn Oracle - What are the Different SQL Data Types Learn Oracle - What are the different types of Databases Visit Pebbles Official Website - http://www.pebbles.in Subscribe to our Channel – https://www.youtube.com/channel/UCNNjWVsQqaMYccY044vtHJw?sub_confirmation=1 Engage with us on Facebook at https://www.facebook.com/PebblesChennai Please Like, Share, Comment & Subscribe
Views: 253 Pebbles Tutorials
08 of  13 - Oracle APEX 5 - List of values (LOV) for a field in a form; display a hidden column
 
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A new series using APEX 18.1 is now available. https://youtu.be/vgrkiIpJEiQ This is one in a series of videos about creating an application using Oracle APEX 5. In this video we create two lists of values (LOVs) in the Shared Components section of our application. We use each LOV in place of a field in a form. We see how APEX will help us write the SQL for a LOV. The difference between a "display value"and a "return value"is discussed. Finally, we display the primary key field in a form, which APEX hides by default. See the primary key field in a form can be helpful during application development. SQL scripts for this series are available to download at: http://db.kreie.net
Views: 36398 Jennifer Kreie
Select and Where: Databases for Developers #4
 
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You query a database table with a select statement. But unless you provide a where clause, this will return you all the rows! That's a lot for you to sift through if your table has millions, billions or trillions of rows. In this episode Chris discusses common conditions for filtering rows so the database only returns what you need. Further reading: Oracle Database 12.2 select syntax: http://docs.oracle.com/database/122/SQLRF/SELECT.htm#SQLRF01702 Oracle Database Concepts Guide on Select: http://docs.oracle.com/database/122/CNCPT/sql.htm#GUID-702909E1-B214-4D30-A0F9-5A4335C2BA4A Take the Databases for Developers FREE SQL course at https://devgym.oracle.com/devgym/database-for-developers.html Daily SQL tips on Twitter: https://twitter.com/SQLDaily Chris on Twitter: https://twitter.com/ChrisRSaxon All Things SQL Blog: https://blogs.oracle.com/sql ============================ The Magic of SQL with Chris Saxon Copyright © 2015 Oracle and/or its affiliates. Oracle is a registered trademark of Oracle and/or its affiliates. All rights reserved. Other names may be registered trademarks of their respective owners. Oracle disclaims any warranties or representations as to the accuracy or completeness of this recording, demonstration, and/or written materials (the “Materials”). The Materials are provided “as is” without any warranty of any kind, either express or implied, including without limitation warranties or merchantability, fitness for a particular purpose, and non-infringement.
Views: 5851 The Magic of SQL
Part 5   SQL query to find employees hired in last n months
 
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Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/05/part-5-sql-query-to-find-employees.html This question is asked is many sql server interviews. If you have used DATEDIFF() sql server function then you already know the answer. -- Replace N with number of months Select * FROM Employees Where DATEDIFF(MONTH, HireDate, GETDATE()) Between 1 and N
Views: 169169 kudvenkat
SQL SELECT statement database basics tutorial: learning, writing, using, examples
 
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SQL SELECT statement is the most commonly used command. Our SQL basics tutorial teaches you (writing and using) that SQL SELECT statement is used to query or retrieve data from a table in the database. Get more on Portnov Computer School website - http://www.portnov.com A query may retrieve information from specified columns or from all of the columns in the table. To create a simple SQL SELECT Statement, you must specify the column(s) name and the table name. The whole query is called SQL SELECT Statement. The SQL SELECT statement returns a result set of records from one or more tables. A SELECT statement retrieves zero or more rows from one or more database tables or database views. In most applications, SELECT is the most commonly used Data Manipulation Language (DML) command. As SQL is a declarative programming language, SELECT queries specify a result set, but do not specify how to calculate it. The database translates the query into a "query plan" which may vary between executions, database versions and database software. This functionality is called the "query optimizer" as it is responsible for finding the best possible execution plan for the query, within applicable constraints. Expressions combine many arithmetic operators, they can be used in SELECT, WHERE and ORDER BY Clauses of the SQL SELECT Statement. Here we will explain how to use expressions in the SQL SELECT Statement. About using expressions in WHERE and ORDER BY clause, they will be explained in their respective sections. The operators are evaluated in a specific order of precedence, when more than one arithmetic operator is used in an expression. The order of evaluation is: parentheses, division, multiplication, addition, and subtraction. The evaluation is performed from the left to the right of the expression.
Views: 179084 portnovschool
07. T-SQL - SELECT DISTINCT
 
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If we used DISTINCT before column name in the SELECT statement then only distinct values from the column are returned.
Views: 607 Farrukh Saeed
Part 2   SQL query to get organization hierarchy
 
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Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/05/part-2-sql-query-to-get-organization.html To get the best out of this video, the following concepts need to be understood first. These are already discussed in SQL Server Tutorial. 1. Self-Join - http://www.youtube.com/watch?v=qnYSN_7qwgg 2. CTE - http://www.youtube.com/watch?v=ZXB5b-7HJHk 3. Recursive CTE - http://www.youtube.com/watch?v=GGoV0wTMCg0 Here is the problem definition: 1. Employees table contains the following columns a) EmployeeId, b) EmployeeName c) ManagerId 2. If an EmployeeId is passed, the query should list down the entire organization hierarchy i.e who is the manager of the EmployeeId passed and who is managers manager and so on till full hierarchy is listed. For example, Scenario 1: If we pass David's EmployeeId to the query, then it should display the organization hierarchy starting from David. Scenario 2: If we pass Lara's EmployeeId to the query, then it should display the organization hierarchy starting from Lara. We will be Employees table for this demo. SQL to create and populate Employees table with test data Create table Employees ( EmployeeID int primary key identity, EmployeeName nvarchar(50), ManagerID int foreign key references Employees(EmployeeID) ) GO Insert into Employees values ('John', NULL) Insert into Employees values ('Mark', NULL) Insert into Employees values ('Steve', NULL) Insert into Employees values ('Tom', NULL) Insert into Employees values ('Lara', NULL) Insert into Employees values ('Simon', NULL) Insert into Employees values ('David', NULL) Insert into Employees values ('Ben', NULL) Insert into Employees values ('Stacy', NULL) Insert into Employees values ('Sam', NULL) GO Update Employees Set ManagerID = 8 Where EmployeeName IN ('Mark', 'Steve', 'Lara') Update Employees Set ManagerID = 2 Where EmployeeName IN ('Stacy', 'Simon') Update Employees Set ManagerID = 3 Where EmployeeName IN ('Tom') Update Employees Set ManagerID = 5 Where EmployeeName IN ('John', 'Sam') Update Employees Set ManagerID = 4 Where EmployeeName IN ('David') GO Here is the SQL that does the job Declare @ID int ; Set @ID = 7; WITH EmployeeCTE AS ( Select EmployeeId, EmployeeName, ManagerID From Employees Where EmployeeId = @ID UNION ALL Select Employees.EmployeeId , Employees.EmployeeName, Employees.ManagerID From Employees JOIN EmployeeCTE ON Employees.EmployeeId = EmployeeCTE.ManagerID ) Select E1.EmployeeName, ISNULL(E2.EmployeeName, 'No Boss') as ManagerName From EmployeeCTE E1 LEFT Join EmployeeCTE E2 ON E1.ManagerID = E2.EmployeeId
Views: 278810 kudvenkat
SQL 016 SELECT WHERE Columns and Rows
 
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Explains the SELECT and WHERE clauses for column and row selection. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.
Views: 874 cbtinc
SQL with Oracle 10g XE - Using IN and BETWEEN with SELECT
 
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In this video I use the IN and BETWEEN to create conditions for my queries. Using AND and OR can produce many of the same results, but IN and BETWEEN can shorten the amount of code needed. This video is part of a series of videos with the purpose of learning the SQL language. For more information visit Lecture Snippets at http://lecturesnippets.com.
Views: 4025 Lecture Snippets
SQL Total Column Count in One Shot
 
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SQL Tut, Column Count in One Shot, Count Column without Order by & group by Thanks and Regards, Kashmiri Cheetah
Views: 808 Amir Muzaffar
SQL Server Programming Part 6 - WHILE Loops
 
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If you'd like to help fund Wise Owl's conversion of tea and biscuits into quality training videos you can click this link https://www.wiseowl.co.uk/donate?t=1 to make a donation. Thanks for watching! By Andrew Gould https://www.wiseowl.co.uk - In SQL Server there is only one type of loop: a WHILE loop. This video teaches you how to use them, from the basic syntax of the WHILE statement, through how to use a SELECT statement within a loop. We'll also cover how to use the BREAK command to exit from a loop, what to do when you inevitably find yourself in an endless loop and, finally, a quick introduction to using loops with cursors. You can download the script to create the Movies database used in this video at the following link: https://www.wiseowl.co.uk/files/execise-question-files/qf-898.zip You can see the range of resources and courses we offer in SQL Server here: https://www.wiseowl.co.uk/sql/ Visit www.wiseowl.co.uk for more online training resources in Microsoft Excel, Microsoft Access, Microsoft PowerPoint, Microsoft Word, Microsoft Project, Microsoft Publisher, Microsoft Visio, SQL Server, Reporting Services, Analysis Services, Visual Studio, ASP.NET, VB.NET, C# and more!
Views: 71873 WiseOwlTutorials
SQL with Oracle 10g XE - Creating Calculated Columns with SELECT
 
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In this video I create a calculated field based off the data from an existing column. When creating a calculated column you can use addition, subtraction, multiplication, and division. In the video I increased a column by 10 percent, decreased it by 15 percent and divided it in half. The results are not stored in the table, but are created on-the-fly. If you need parenthesis you can use them to change the order of operations in your math calculation. This video is part of a series of videos with the purpose of learning the SQL language. For more information visit Lecture Snippets at http://lecturesnippets.com.
Views: 9338 Lecture Snippets
SQL String Functions PART  -- 1
 
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String functions are used in computer programming languages to manipulate a string or query information about a string (some do both). ... The most basic example of a string function is the length(string) function. This function returns the length of a string literal.Scalar-valued UDFs are an easy way to define constant values to use in your database environment. You can pass field values as parameters into UDFs. You can nest scalar function calls. This means that you can pass a call to a scalar-valued function to another function or stored procedure.Numeric functions perform manipulation of numbers that normally are contained in a table column. ... Returns a numeric value, rounded to the specified length or precision. SIGN() SQL server, MySQL, Oracle, PostgreSQL. Returns the positive (+1), zero (0), or negative (-1) sign of a numeric expression.A stored function (also called a user function or user-defined function) is a set of PL/SQL statements you can call by name. Stored functions are very similar to procedures, except that a function returns a value to the environment in which it is called. User functions can be used as part of a SQL expression.Function must return a value but in Stored Procedure it is optional( Procedure can return zero or n values). Functions can have only input parameters for it whereas Procedures can have input/output parameters . ... Functions can be called from Procedure whereas Procedures cannot be called from Function,The CTE was introduced into standard SQL in order to simplify various classes of SQL Queries for which a derived table just wasn't suitable. ... Introduced in SQL Server 2005, the common table expression (CTE) is a temporary named result set that you can reference within a SELECT, INSERT, UPDATE, or DELETE statement.The isDate(string, string) function accepts two string arguments. It takes them, compares the first argument with the second as a pattern and, if the first string can be converted to a date which is valid within system value of locale , according to the specified pattern , the function returns true.printf does the same, treating %s as a pointer-to-string. In C, variables that are arrays become a pointer to the first element of the array when used as function arguments -- so your scanf() sees a pointer to memory (assuming "str1" is an array). SQL - Useful Functions SQL COUNT Function - The SQL COUNT aggregate function is used to count the number of rows in a database table. SQL MAX Function - The SQL MAX aggregate function allows us to select the highest (maximum) value for a certain column. More items... SQL has many built-in functions for performing processing on string or numeric data. Following is the list of all useful SQL built-in functions − SQL COUNT Function - The SQL COUNT aggregate function is used to count the number of rows in a database table. SQL MAX Function - The SQL MAX aggregate function allows us to select the highest (maximum) value for a certain column. SQL MIN Function - The SQL MIN aggregate function allows us to select the lowest (minimum) value for a certain column. SQL - The SQL AVG aggregate function selects the average value for certain table column. SQL SUM Function - The SQL SUM aggregate function allows selecting the total for a numeric column. SQL SQRT Functions - This is used to generate a square root of a given number. SQL RAND Function - This is used to generate a random number using SQL command. SQL CONCAT Function - This is used to concatenate any string inside any SQL command. SQL Numeric Functions - Complete list of SQL functions required to manipulate numbers in SQL. SQL String Functions - Complete list of SQL functions required to manipulate strings in SQL. Returns a Unicode string with the delimiters added to make the input string a valid SQL Server delimited identifier. REPLACE. Replaces a sequence of characters in a string with another set of characters. REPLICATE. Repeats a string value a specified number of times.SQL. Character Functions with Examples. Character functions accept character inputs and can return either characters or number values as output. SQL provides a number of different character datatypes which includes – CHAR, VARCHAR, VARCHAR2, LONG, RAW, and LONG RAW.Aggregate Functions: Aggregates the values and return a single value, below is the list of some aggregate values in sql server. These functions are created by user in the system database, and we have 3 types of user define functions: Scalar Function. Inline Table-Valued Function.
Views: 40 Technology mart
Select Salary Less Than Average Salary in Oracle
 
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Find Employees With Salary Higher Than Their Department Average Salary in Oracle Database
Views: 51 Adam Tech
How to Join 3 tables in 1 SQL query
 
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Get your first month on the Joes 2 Pros Academy for just $1 with code YOUTUBE1. Visit http://www.joes2pros.com Offer expires July 1, 2015 From the newly released 2 Disc DVD set (SQL Queries Joes 2 Pros Vol2) this video shows how to join 3 tables in 1 query.
Views: 250975 Joes2Pros SQL Trainings
Calculate running total in SQL Server 2012
 
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running total sql server cumulative total in ms sql server running total column In this video we will discuss how to calculate running total in SQL Server 2012 and later versions. We will use the following Employees table for the examples in this video. SQL Script to create Employees table Create Table Employees ( Id int primary key, Name nvarchar(50), Gender nvarchar(10), Salary int ) Go Insert Into Employees Values (1, 'Mark', 'Male', 5000) Insert Into Employees Values (2, 'John', 'Male', 4500) Insert Into Employees Values (3, 'Pam', 'Female', 5500) Insert Into Employees Values (4, 'Sara', 'Female', 4000) Insert Into Employees Values (5, 'Todd', 'Male', 3500) Insert Into Employees Values (6, 'Mary', 'Female', 5000) Insert Into Employees Values (7, 'Ben', 'Male', 6500) Insert Into Employees Values (8, 'Jodi', 'Female', 7000) Insert Into Employees Values (9, 'Tom', 'Male', 5500) Insert Into Employees Values (10, 'Ron', 'Male', 5000) Go SQL Query to compute running total without partitions SELECT Name, Gender, Salary, SUM(Salary) OVER (ORDER BY ID) AS RunningTotal FROM Employees SQL Query to compute running total with partitions SELECT Name, Gender, Salary, SUM(Salary) OVER (PARTITION BY Gender ORDER BY ID) AS RunningTotal FROM Employees What happens if I use order by on Salary column If you have duplicate values in the Salary column, all the duplicate values will be added to the running total at once. In the example below notice that we have 5000 repeated 3 times. So 15000 (i.e 5000 + 5000 + 5000) is added to the running total at once. SELECT Name, Gender, Salary, SUM(Salary) OVER (ORDER BY Salary) AS RunningTotal FROM Employees So when computing running total, it is better to use a column that has unique data in the ORDER BY clause. Text version of the video http://csharp-video-tutorials.blogspot.com/2015/10/calculate-running-total-in-sql-server.html Slides http://csharp-video-tutorials.blogspot.com/2015/10/calculate-running-total-in-sql-server_3.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 53368 kudvenkat
SQL Tutorial - 13: Inserting Data Into a Table From Another Table
 
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In this tutorial we'll learn to use the INSERT Query to copy data from one table into another.
Views: 246304 The Bad Tutorials
Finding Duplicates using Count in SQL Select (Arabic)
 
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ايجاد عدد التكرار في الاستعلام
Views: 298 Waheed Alsayer
SQL String Functions PART  -- 2
 
21:01
sql String functions are used in computer programming languages to manipulate a string or query information about a string (some do both). ... The most basic example of a string function is the length(string) function. This function returns the length of a string literal.Scalar-valued UDFs are an easy way to define constant values to use in your database environment. You can pass field values as parameters into UDFs. You can nest scalar function calls. This means that you can pass a call to a scalar-valued function to another function or stored procedure.Numeric functions perform manipulation of numbers that normally are contained in a table column. ... Returns a numeric value, rounded to the specified length or precision. SIGN() SQL server, MySQL, Oracle, PostgreSQL. Returns the positive (+1), zero (0), or negative (-1) sign of a numeric expression.A stored function (also called a user function or user-defined function) is a set of PL/SQL statements you can call by name. Stored functions are very similar to procedures, except that a function returns a value to the environment in which it is called. User functions can be used as part of a SQL expression.Function must return a value but in Stored Procedure it is optional( Procedure can return zero or n values). Functions can have only input parameters for it whereas Procedures can have input/output parameters . ... Functions can be called from Procedure whereas Procedures cannot be called from Function,The CTE was introduced into standard SQL in order to simplify various classes of SQL Queries for which a derived table just wasn't suitable. ... Introduced in SQL Server 2005, the common table expression (CTE) is a temporary named result set that you can reference within a SELECT, INSERT, UPDATE, or DELETE statement.The isDate(string, string) function accepts two string arguments. It takes them, compares the first argument with the second as a pattern and, if the first string can be converted to a date which is valid within system value of locale , according to the specified pattern , the function returns true.printf does the same, treating %s as a pointer-to-string. In C, variables that are arrays become a pointer to the first element of the array when used as function arguments -- so your scanf() sees a pointer to memory (assuming "str1" is an array). SQL - Useful Functions SQL COUNT Function - The SQL COUNT aggregate function is used to count the number of rows in a database table. SQL MAX Function - The SQL MAX aggregate function allows us to select the highest (maximum) value for a certain column. More items... SQL has many built-in functions for performing processing on string or numeric data. Following is the list of all useful SQL built-in functions − SQL COUNT Function - The SQL COUNT aggregate function is used to count the number of rows in a database table. SQL MAX Function - The SQL MAX aggregate function allows us to select the highest (maximum) value for a certain column. SQL MIN Function - The SQL MIN aggregate function allows us to select the lowest (minimum) value for a certain column. SQL - The SQL AVG aggregate function selects the average value for certain table column. SQL SUM Function - The SQL SUM aggregate function allows selecting the total for a numeric column. SQL SQRT Functions - This is used to generate a square root of a given number. SQL RAND Function - This is used to generate a random number using SQL command. SQL CONCAT Function - This is used to concatenate any string inside any SQL command. SQL Numeric Functions - Complete list of SQL functions required to manipulate numbers in SQL. SQL String Functions - Complete list of SQL functions required to manipulate strings in SQL. Returns a Unicode string with the delimiters added to make the input string a valid SQL Server delimited identifier. REPLACE. Replaces a sequence of characters in a string with another set of characters. REPLICATE. Repeats a string value a specified number of times.SQL. Character Functions with Examples. Character functions accept character inputs and can return either characters or number values as output. SQL provides a number of different character datatypes which includes – CHAR, VARCHAR, VARCHAR2, LONG, RAW, and LONG RAW.Aggregate Functions: Aggregates the values and return a single value, below is the list of some aggregate values in sql server. These functions are created by user in the system database, and we have 3 types of user define functions: Scalar Function. Inline Table-Valued Function.
Views: 20 Technology mart
SQL Tutorial 9: HAVING and DISTINCT clause
 
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HAVING clause is used to filter rows generated with a GROUP BY statement. It is an equivalent of WHERE. WHERE filters each row of the result generated; HAVING filters each row of the generated result. HAVING clause may include compound filter conditions just like on WHERE clause. You may only use HAVING clause if you have a GROUP BY in your SELECT statement. The video shows the on how an aggregate function COUNT is used in the example. Function YEAR() is also used as part of the HAVING filter condition. Examples show on how to group columns using GROUP BY with an aggregate function to generate the desired result. DISTINCT eliminates occurrence of same set of rows. On some occasions, you may use DISTINCT as a replacement for the GROUP BY clause. One example shows on how to use SELECT statement with a WHERE, ORDER BY, GROUP BY, HAVING clauses. As you become familiar with the syntax, it may offer a time-saving approach to generate the result you need. HAVING, WHERE, DISTINCT, COUNT, MAX and other aggregate functions are standard in all SQL DBMS products. It has the same syntax as you work with Informix, Oracle, MS SQL Server, MySQL, in addition to DB2. Link for the ebook will be announced later.
Views: 1360 Jerry Esperanza
NTILE function in SQL Server
 
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In this video we will discuss NTILE function in SQL Server NTILE function 1. Introduced in SQL Server 2005 2. ORDER BY Clause is required 3. PARTITION BY clause is optional 4. Distributes the rows into a specified number of groups 5. If the number of rows is not divisible by number of groups, you may have groups of two different sizes. 6. Larger groups come before smaller groups For example NTILE(2) of 10 rows divides the rows in 2 Groups (5 in each group) NTILE(3) of 10 rows divides the rows in 3 Groups (4 in first group, 3 in 2nd & 3rd group) Syntax : NTILE (Number_of_Groups) OVER (ORDER BY Col1, Col2, ...) SQL Script to create Employees table Create Table Employees ( Id int primary key, Name nvarchar(50), Gender nvarchar(10), Salary int ) Go Insert Into Employees Values (1, 'Mark', 'Male', 5000) Insert Into Employees Values (2, 'John', 'Male', 4500) Insert Into Employees Values (3, 'Pam', 'Female', 5500) Insert Into Employees Values (4, 'Sara', 'Female', 4000) Insert Into Employees Values (5, 'Todd', 'Male', 3500) Insert Into Employees Values (6, 'Mary', 'Female', 5000) Insert Into Employees Values (7, 'Ben', 'Male', 6500) Insert Into Employees Values (8, 'Jodi', 'Female', 7000) Insert Into Employees Values (9, 'Tom', 'Male', 5500) Insert Into Employees Values (10, 'Ron', 'Male', 5000) Go NTILE function without PARTITION BY clause : Divides the 10 rows into 3 groups. 4 rows in first group, 3 rows in the 2nd & 3rd group. SELECT Name, Gender, Salary, NTILE(3) OVER (ORDER BY Salary) AS [Ntile] FROM Employees What if the specified number of groups is GREATER THAN the number of rows NTILE function will try to create as many groups as possible with one row in each group. With 10 rows in the table, NTILE(11) will create 10 groups with 1 row in each group. SELECT Name, Gender, Salary, NTILE(11) OVER (ORDER BY Salary) AS [Ntile] FROM Employees NTILE function with PARTITION BY clause : When the data is partitioned, NTILE function creates the specified number of groups with in each partition. The following query partitions the data into 2 partitions (Male & Female). NTILE(3) creates 3 groups in each of the partitions. SELECT Name, Gender, Salary, NTILE(3) OVER (PARTITION BY GENDER ORDER BY Salary) AS [Ntile] FROM Employees Link for all dot net and sql server video tutorial playlists https://www.youtube.com/user/kudvenkat/playlists?sort=dd&view=1 Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2015/10/ntile-function-in-sql-server.html
Views: 37520 kudvenkat
Aggregate Functions in SQL Server || AVG, COUNT, GROUPING functions in SQL
 
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This video will provide you the details of each Aggregate functions in SQL Server 2014. I'll be walking through each and every kinds of build in function which are available in SQL Server in my next videos. ******************************************************************************** Aggregate Functions (Transact-SQL) Aggregate functions perform a calculation on a set of values and return a single value. Except for COUNT, aggregate functions ignore null values. Aggregate functions are frequently used with the GROUP BY clause of the SELECT statement. Aggregate functions can be used as expressions only in the following: • The select list of a SELECT statement (either a subquery or an outer query). • A HAVING clause. ******************************************************************************** AVG (Transact-SQL) Returns the average of the values in a group. Null values are ignored.  Syntax AVG ( [ ALL | DISTINCT ] expression ) OVER ( [ partition_by_clause ] order_by_clause )  Arguments ALL Applies the aggregate function to all values. ALL is the default. DISTINCT Specifies that AVG be performed only on each unique instance of a value, regardless of how many times the value occurs. expression Is an expression of the exact numeric or approximate numeric data type category, except for the bit data type. Aggregate functions and subqueries are not permitted. OVER ( [ partition_by_clause ] order_by_clause) partition_by_clause divides the result set produced by the FROM clause into partitions to which the function is applied. If not specified, the function treats all rows of the query result set as a single group. order_by_clause determines the logical order in which the operation is performed.order_by_clause is required.  Return Types The return type is determined by the type of the evaluated result of expression. Expression result Return type tinyint int smallint int int int bigint bigint decimal category (p, s) decimal(38, s) divided by decimal(10, 0) money and smallmoney category money float and real category float ******************************************************************************** COUNT (Transact-SQL) Returns the number of items in a group. COUNT works like the COUNT_BIG function. The only difference between the two functions is their return values. COUNT always returns an int data type value. COUNT_BIG always returns a bigint data type value.  Syntax -- Syntax for SQL Server and Azure SQL Database COUNT ( { [ [ ALL | DISTINCT ] expression ] | * } ) [ OVER ( [ partition_by_clause ] [ order_by_clause ] [ ROW_or_RANGE_clause ] ) ]  Arguments ALL Applies the aggregate function to all values. ALL is the default. DISTINCT Specifies that COUNT returns the number of unique nonnull values. expression Is an expression of any type except text, image, or ntext. Aggregate functions and subqueries are not permitted. * Specifies that all rows should be counted to return the total number of rows in a table. COUNT(*) takes no parameters and cannot be used with DISTINCT. COUNT(*) does not require an expression parameter because, by definition, it does not use information about any particular column. COUNT(*) returns the number of rows in a specified table without getting rid of duplicates. It counts each row separately. This includes rows that contain null values. OVER ( [ partition_by_clause ] [ order_by_clause ] [ ROW_or_RANGE_clause ] ) partition_by_clause divides the result set produced by the FROM clause into partitions to which the function is applied. If not specified, the function treats all rows of the query result set as a single group. order_by_clause determines the logical order in which the operation is performed.  Return Types int ******************************************************************************** GROUPING (Transact-SQL) Indicates whether a specified column expression in a GROUP BY list is aggregated or not. GROUPING returns 1 for aggregated or 0 for not aggregated in the result set. GROUPING can be used only in the SELECT list, HAVING, and ORDER BY clauses when GROUP BY is specified.  Syntax GROUPING ( column_expression)  Arguments Is a column or an expression that contains a column in a GROUP BY clause.  Return Types tinyint
Views: 148 Softtech forum
Counting to 100 song | Learn to count to 100 | NurseryTracks
 
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Counting to 100 song | Learn to count to 100 | NurseryTracks Children get very excited when they start to count beyond ten and here's our own, original NurseryTracks song to help them count all the way up to one hundred! We give the little ones three cheers and a trombone fanfare for every ten numbers achieved. Enjoy. Our website www.nurserytracks.com has the lyrics for each song, as well as FREE coloring pictures. Copyright information: Words and music copyright Nick Hall. Arrangement Nick Hall.
Views: 17984231 NurseryTracks
SQL 117 - SQL SERVER - GROUP BY and COUNT function
 
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englishspacedog YouTube tutorial from Canada http://www.herostratus.ca/PC.htm How to use the GROUP BY construct and the COUNT function SELECT tblGALAXIES.GalaxyID, tblGALAXIES.GalaxyName, tblSTARS.StarID, tblSTARS.StarName, tblPLANETS.PlanetID, tblPLANETS.PlanetName, rtrim(ltrim(tblPLANETS.PlanetName)) + ' ' + tblSTARS.StarName AS PlanetFullName, tblPLANETS.PlanetWeight /(SELECT PlanetWeight FROM tblPLANETS WHERE PlanetID = 3) AS WeightInEarths FROM tblGALAXIES LEFT JOIN tblSTARS ON tblGALAXIES.GalaxyID = tblSTARS.GalaxyID LEFT JOIN tblPLANETS ON tblSTARS.StarID = tblPLANETS.StarID ORDER BY tblGALAXIES.GalaxyName, tblSTARS.StarName, tblPLANETS.PlanetName; SELECT tblPLANETS.PlanetName, COUNT(*) as PlanetCount FROM tblPLANETS GROUP BY PlanetName;
Views: 144 MS / Access
Best Way to Write Basic SQL Queries
 
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SQL Server Query writing strategies is something I have yet to find in any book. When enthusiastic SQL students do this, they experience a revelation. The number of errors drops significantly and the speed at writing complex queries increases immediately. Knowing how to narrow down what we are looking for amongst a vast list of choices helps immensely. Grabbing the right tables first and then the fields second is akin to grabbing the right menu before ordering an item from it. In fact, one student named Tim took this back to his team of SQL developers and they immediately implemented this process. We are all used to following steps. Most of the time, actions are sequential from top to bottom or left to right. Other times we complete things in phases. The two phases we are going to use in this exercise apply to joining tables. This is easy to implement as we only need remember to organize first and clean up second. When visiting a new restaurant, we will ask to see the menu, because we want to see all they have to offer. The odds are that we might be interested in half of the items, but only need a few dishes for our group at the table. Looking at the menu is like starting a query with a ‘SELECT *’ statement. Once we have looked at all the fields, we narrow our choice(s) to only the items we want at the time. Sometimes restaurants have multiple menus. My favorite restaurant has a kids’ menu, an adult menu, a gluten-free menu and a drink menu. These menus were each gathered at our table. Ultimately, in my head, a selection was narrowed to what was needed. Phase I: Organize. When building a new query from many tables, we often find ourselves wondering, “Where do I start?” First, lay the steps out by identifying which tables contain the essential data. Second, get all the table joins working with a basic ‘SELECT *’ statement. Third, add any basic filtering criteria. Phase II: Itemize. Once all joins and criteria, such as SELECT, FROM and WHERE are working, we are ready for Phase II. This entails going back and changing our ‘SELECT *’ to an itemized SELECT field list as the final step. Let’s explore how this two-phase process of Organize and then Itemize can be a big time-saver. We are going to use one of the challenges from the last lab. In Lab 3.2 (Outer Joins), Skill Check 2, we needed to get four fields from two different tables. If we were to list all four desired fields and test one table at time, we will get an error as seen on the right side of the figure below. In the figure below we write a SELECT statement and part of the FROM clause. When completed, the FROM clause will have two tables, but for now we just want to get the Location table working. By using the ‘SELECT *’ strategy, we remove any possible errors from line 1. From there, we can focus on the more complicated logic used for joining tables together. We can add tables one at a time until everything is working. This is the Organize phase. NOTE: SELECT * never results in an Error message stating “invalid column name”, however; a SELECT list with itemized field(s) can have this error. After our query is organized and working, we can go back and itemize the SELECT field list to display only the fields that are necessary. This is done during Phase II (Itemize). The steps for this system are broken down as follows: Since SELECT is always the first statement in a query, it’s natural to want to write the field names before writing the FROM clause. However; we can save time and trouble by using the ‘*’ until the entire query is working properly. When this is complete, it is very easy to itemize the field list, with the confidence of knowing it will not cause any problems. Exercise: Simple membership for a club: Table1 (id_Member,name_Member, email_member, title, age, company) Table2 (id_Club,club_name, club_Location, address) Table3 (id_club, id_member,membership_date) Q1: Show all member names, email, age, and company from Table1 Q2: Show all club name, location, and address data Q3: Show member name, club name, club location (hint: Use joins and all 3 tables) You can find all other classes related to this video here: http://www.joes2pros.com/joes2pros/Course/Introduction_To_Microsoft_SQL_Server Enroll Today & Get the First Month for only $1! Use code: YOUTUBE1
Views: 213143 Joes2Pros SQL Trainings

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