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Difference between Delete and Truncate and Drop in Oracle Sql
 
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This is a free tutorial on understanding difference between drop, delete and truncate statements. I have tried to cover most of the major difference between all these three statements and have also shown the same with simple and easy to understand examples. Hope it will be helpful to all. If you want more such videos of exciting and amazing 'difference between' concepts, check out the links below : union and union all : https://youtu.be/n9FqQOd8liY char and varchar2 : https://youtu.be/039qzwjWf4k replace and translate : https://youtu.be/HKYF77BGzOE procedure and function : https://youtu.be/q3LmOenL120 in and exists : https://youtu.be/REX4IjRYlFw rank and dense_rank : https://youtu.be/WGSX998hZ9M %type and %rowtype : https://youtu.be/MlLUFeZ_3eM
Views: 1730 Kishan Mashru
Difference Between Delete and Truncate
 
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Below is link for Useful Pl/SQL Books http://goo.gl/XMy0tt ---------------------------------------------------------- Difference Between Delete and Truncate in Detail On bigger picture they serve the same purpose but there are many Differences listed with examples Point Delete Truncate 1. Data Recovery Delete: Come under the DML Category, we need to commit or Rollback explicitly to make the changes permanent, so we can recover the data by Rollback command fully with in a session or up to a point if Save Points are used Fall In DDL Category (DDL Command issue the Auto commit implicitly) so no chances of Recovery even not using the Flashback table method. But Truncate operations are also logged , they didn’t generate redo SQL but they are logged , view for truncated data info V$LOGMNR_CONTENTS 2. Data Removal Delete Can remove all or selected data using the Where Clause predicates. Or we can say delete any subset of rows We can Truncate complete table or a partition or sub partition of a table. 3. Speed Delete is Slower because oracle maintain the redo logs for Read Consistency (so that every session connected can see a consistent data at a given point of time ) Delete is very time consuming activity especially when table have numerous indexes and Triggers associated with table Faster as no data logs are maintained no associated trigger firing. 4. DML Triggers Firing DML (Delete) triggers associated with table will fire. DML Trigger will not fire in case of truncate method. 5. Flashback Technology Data can be recovered even after commit operation using Flashback Table options Flashback_transaction_query table will give what to recover and up to which point. Data cannot be recovered in truncate method by Flashback table option. 6. Referential Integrity Constraint Behavior if we don’t have related data in child table then we can delete the data from the parent table or we have variants like On Delete Cascade & on Delete set Null. We can’t truncate a table with enable Referential Integrity Constraint, even there is no data in the child table, we have to disable or drop the constraint if we want to truncate the table. Exception: Truncate is possible if the FK is self-referential means primary key and foreign key are on the same table. 7. Space De allocation or Space Utilization No extent reset with delete when deleting rows from a table, extents are not de allocated, So if there were 50 extents in the table before the deletion, there will still be 50 after the deletion. Truncate: When a table is truncated it will free the space allocated except in case of reuse storage clause. This space can subsequently be used only by new data in the table or cluster resulting from insert or update operations .All extents are de allocated leaving only the extents specified when the table was originally created .Example So if the table was originally created with min extents 3, there will be 3 extents remaining when the tables is truncated. When you truncate a table, NEXT is automatically reset to the last extent deleted. 8. High Water Mark Delete will not reset the high water mark Truncate will reset the High Water mark which is very important for performance point of view as in case of full table scan and full index scan oracle will read all the block under high water mark this makes a lot of difference in terms of performance. 9. Cluster No as such restriction with delete. You cannot individually truncate a table that is part of a cluster. You must truncate the cluster, Delete all rows from the table, or drop and re-create the table. 10. Information Capturing Delete : we can capture the row information what we have deleted using Delete Method, f you are deleting multiple records then use composite data types (collections & records) Truncate Don’t have this feature of capturing the deleted records. 11. Function Based Index Impact DELETE You cannot delete rows from a table if a function-based index on the table has become invalid. You must first validate the function-based index. Truncate: No as such restriction 12. UNUSABLE Indexes Delete no as such feature. Truncate if table is not empty then truncate make all unusable indexes to useable. 13. Complex views You cannot delete data from a Complex view except through INSTEAD OF triggers. But we can delete data from simple Views and MV. We cannot truncate a view simple or complex but you can truncate MV with special Features like Preserve MV Logs and Purge MV Logs. 14. Privileges Delete You need to provide delete table privilege on object. Truncate you must have drop table privilege there is no truncate table privilege exists. 15. Domain Index No as such restriction You cannot truncate the object having domain index in invalid or In progress state
Views: 13112 Ram Gupta
Oracle SQL Tutorial 13 - How to Add Column Constraints (Attributes)
 
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So far, we have this table declaration: CREATE TABLE users( user_id NUMBER, username VARCHAR(50 CHAR) first_name VARCHAR2(50 CHAR), last_name VARCHAR2(50 CHAR) ) We can run this command see that it works. As we are learning though, we are going to want to be able to recreate our table with different settings and such, but if you try to run this command, it will complain that the table already exists. So we first need to delete this table before we start editing settings. When we get more experienced, we will learn about ways to edit the structure of a table that already exists. To fix this, we can get rid of the table using the DROP TABLE command: DROP TABLE users You can run this every time if you need to practice by adding a semicolon after it. This is how you can tell Oracle that you are putting in another command after it. This is known as a delimiter. When you run the script, it is going to run both commands. Now we can go through and reconsider our table structure. This is fine for starting out because we don't have any important data in our database, but once your database is in production you are not going to want to just drop tables. In the last video we discussed different constraints that you can apply to columns in a database table, but how do you actually apply these when you are creating a table? The first way you define constraints is to put them right after the column in your CREATE TABLE statement. CREATE TABLE users( username VARCHAR2(50 CHAR) NOT NULL ) When we define constraints this way, we usually say we are adding column attributes. If you have two constraints you want to add, you just put one after the other with spaces in between. There is no particular order that is required. CREATE TABLE users( username VARCHAR2(50 CHAR) NOT NULL UNIQUE ) In this situation we have already given the column the NOT NULL and UNIQUE attributes, so we should consider making this a primary key: CREATE TABLE users( username VARCHAR2(50 CHAR) PRIMARY KEY ) As you can see, adding column attributes is super easy. We can add a default like this: CREATE TABLE users( username VARCHAR2(50 CHAR) PRIMARY KEY, account_balance NUMBER DEFAULT 0 ) Note that now we need the comma after the first row. There are a few constraints we did not talk go through an example, specifically foreign keys and check constraints. We will be adding these constraints to our database in future videos. In the mean time, I have a thought for you… Many people prefer to name their column constraints. That way, we can refer to certain constraints by name. For example, we might have a primary key constraint that could be named users_pk. The way we are creating these constraints does not allow for this feature, so in the next video we are going to be discussing different ways to create constraints. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support me on Patreon! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 20105 Caleb Curry
SQL Server Temp Tables - TSQL Command Line  with  IF EXISTS and  DROP TABLE
 
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Discussion of Temp Tables and persistence and why IF EXISTS and DROP TABLE are not necessary. Temp Tables are created in the tempdb system database in SQL Server. They are persistent but not necessarily long lived. Temp tables hav many similarities to true tables, however they also have special properties that allow more flexibility respecting scope.
Views: 1823 Dave Merton
Oracle Database11g tutorials 14 : How to CREATE TABLE using sql developer and command prompt
 
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Oracle Database11g tutorials 14 How to Create table using command prompt and Create table using sql developer Blog Link http://bit.ly/1TkY4Oe Time Line 0:25 Introduction of Tables in Database 1:03 What is Create Table (Introduction of create table) 1:30 Syntax of Create Table 2:08 How to create table using Command Prompt 4:55 How to create table using SQL Developer Links for Oracle Database tutorials 4: database connectivity using SQL developer and command prompt http://youtu.be/wSqoXRlXDUU You can have indepth knowledge about SQL create table here http://www.rebellionrider.com/sql-create-table.html 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 Today in this oracle database tutorial we will see How to CREATE A TABLE. if we have to define a table in layman language then we can say that Tables are just a collection of Rows and Columns but In RDBMS tables are database objects which help in organizing data into ROWS and COLUMNS. We can also say that SQL tables are kind of data structure which are used by database for efficient storage of data. To create a table in our database we use SQL CREATE TABLE command. SQL CREATE TABLE is a type of DATA DEFINITION LANGUAGE also known as DDL. To Create a table in your schema you will require CREATE TABLE system privilege. In our future videos we will see what are system and object privileges and how to grant them to a user. Today for this video we will be using Sample schema HR which already has all the necessary privileges. Ohk Let's see the syntax. CREATE TABLE table name ( column name1 Data-Type(size), column name2 Data-Type(size), ..... ); CREATE TABLE is an oracle reserved word or say an Oracle key word whereas There are 3 different ways of creating a table in Oracle database. Creating a table using Command Line Interface (CLI) in Oracle database For demonstrating how to create table in oracle database using CLI, I'll be using Command prompt. Thats how we create table using command prompt. you can check your table structure by DESCRIBE command for that just write DESC and your table name. Like this Another way of creating a table is by using Graphic user interface (GUI) in Oracle database To demonstrate how to create table using GUI we will use SQL developer. Lets open our SQL developer I am connected to HR schema if you do not know how to create a connection to database using SQL developer please watch my oracle database tutorial 4 that explains database connectivity using SQL developer and command prompt. Link for this video is in the description below. So lets create a table. Creating a table using SQL developer is very easy we do not have to fire any query here. Let's start First of all right click on your connection in which you want to create a table and choose schema browser. This will open a separate schema browser pane or you can expend your connection by clicking this + sign and then right click on table and choose New Table. However I prefer working with schema browser so let's skip to schema browser pane here from the first drop-down list you can choose connection name and in the second drop down list you can choose what database objects you want to work with we want to create a table thus I'll choose table and then click this arrow here and choose option for new table Ok we have created a table wizard first of all give a unique name to your table and add some column as well. For this, click the green plus button. Now we already have a column so give it some name. Also choose a datatype from the list and specify any size you can check this not null column if in case you want to make this a mandatory column you can also specify default value and constraint If you want to make this column a primary key you can click here In my future video i'll show you what are these constraints and different ways of applying them on a column in a table. for this video we will concentrate on create table only so when you are done with all your columns click ok Thats your table You can double click on your table here and can see its structure. Thats it
Views: 176023 Manish Sharma
SQL Error ORA-00942 Table or View Does Not Exist in Oracle Database
 
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How to use Tab View (Data Dictionary) of Oracle Database to solve the SQL Error ORA-00942 Table or View Does Not Exist error in Oracle Database ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog: http://bit.ly/ora-00942 Previous Tutorial ► ------------------------------------------------------------------------- ►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 http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ ___Facebook Official Page of Manish Sharma___ https://www.facebook.com/TheRebellionRider/ ___Facebook Official Page of RebellionRider.com___ https://www.facebook.com/RebellionRider.official/ You can also Email me at for E-mail address please check the 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: 6540 Manish Sharma
Check Last Modified DateTime for An Object (Table,Stored Procedure,Trigger etc.) in SQL Server
 
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We as SQL Server developers send our DDL Scripts ( Add New Column, Drop some column from table, or Alter Stored Procedure) to DBA. After deployment we verify those changes and sometime it happens that the changes are not done. Maybe DBA has missed one of the script to run. If we can get the last modified date for object ( Table,Stored Procedure, View etc) that can confirm the changes are done on given date. blog post link for scripts used in this video http://sqlage.blogspot.com/2014/01/tsql-how-to-check-when-object-table.html
Views: 7418 TechBrothersIT
MSSQL   Check if index exists and if exists delete it
 
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More: http://howtodomssqlcsharpexcelaccess.blogspot.ca/2016/02/mssql-check-if-index-exists-and-if.html
Views: 458 Vis Dotnet
CASE STATEMENT(IF THEN ELSE) IN ORACLE SQL WITH EXAMPLE
 
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The case statement gives the if-then-else kind of conditional ability to the otherwise static sql select statement, This video demonstrates how to write an case statement in oracle sql, and explains different aspects of the case statement. The video explains the execution flow of the case statement and advises on the best way to write one.
Views: 1966 Kishan Mashru
Delete, Drop, and Truncate Statements in Hive
 
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Delete, Drop, and Truncate Statements in Hive Delete Statement: Delete statement is used to delete certain rows from a table based on a condition specified using the WHERE clause. The syntax is in below as highlighted. DELETE FROM tablename [WHERE expression]; Note: DELETE statement is available from hive 0.14.0 version and above Drop Statement: The drop table statement is used to drop the table altogether. The syntax is highlighted here: DROP TABLE IF EXISTS TABLENAME; Let’s quickly see how the managed table and external table differs when dropping the table. We have already discussed this in the “Two different types of hive tables” video. Take a look at it if you haven’t. For the managed hive tables, the drop table statement removes the metadata information as well as the data. The data will be actually moved to .Trash/Current directory. metadata will be permanently deleted. However for external tables, only the metadata information is permanently deleted and the actual data remains intact in the hdfs directories. So in the case of external table, if the table was deleted accidentally, then the table can be re-created by using the same schema and specifying the same location for the hdfs data directory. If deleting the external table was the intention, then after deleting the table using the drop statement, you may also delete the underlying hdfs data directory by issuing the hdfs dfs -rm command. Truncate Statement: Truncate table statement is used to remove only the data from the table. The table structure with the schema remains intact. Truncate removes all the rows from a table or partition. The syntax is highlighted below. TRUNCATE table syntax TRUNCATE TABLE TABLENAME;
Views: 1391 BigDataElearning
Difference between Replace and Translate function in oracle
 
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This video demonstrates the difference between a replace function and a translate function in oracle using an suitable example. Both the function does a similar task, but has a lot of difference in implementation and output when used. Be learning the difference users can easy justify the correct scenarios on where to use translate and when to use replace. If you want more such videos of exciting and amazing 'difference between' concepts, check out the links below : union and union all : https://youtu.be/n9FqQOd8liY char and varchar2 : https://youtu.be/039qzwjWf4k procedure and function : https://youtu.be/q3LmOenL120 in and exists : https://youtu.be/REX4IjRYlFw rank and dense_rank : https://youtu.be/WGSX998hZ9M delete and truncate : https://youtu.be/u76wMm2byXo %type and %rowtype : https://youtu.be/MlLUFeZ_3eM
Views: 2002 Kishan Mashru
Difference between Case and Decode
 
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This video tutorial explains on how case statement and decode function are different from each other. Though both of them are used in giving the if-then-else conditional functionality to sql statement, they differ much from each other, this video will walk through each of the difference with appropriate examples. If you want more such videos of exciting and amazing 'difference between' concepts, check out the links below : char and varchar2 : https://youtu.be/039qzwjWf4k replace and translate : https://youtu.be/HKYF77BGzOE procedure and function : https://youtu.be/q3LmOenL120 in and exists : https://youtu.be/REX4IjRYlFw rank and dense_rank : https://youtu.be/WGSX998hZ9M delete and truncate : https://youtu.be/u76wMm2byXo %type and %rowtype : https://youtu.be/MlLUFeZ_3eM
Views: 11935 Kishan Mashru
#dropstoredprocedure #dropprocedure #sqlprocedure How To Drop Stored Procedure In SQL
 
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sql drop stored procedure if exists, drop procedure sql server if exists, drop procedure mysql, , drop stored procedure oracle , how to delete all stored procedure in sql server , drop procedure db2 , drop stored procedure w3schools , sql create procedure Dosto AAP sabhi ka swagat h mere Youtube Channel Technical Sanatan me, Mai daily Software and Hardware Related Videos Post Karta hu....Plzz Support.. Like , Comment Subscribe: https://www.youtube.com/user/sanatan330 Twitter: https://twitter.com/SANATANSHARMA Facebook: https://www.facebook.com/sanatan09 Facebook Page: https://www.facebook.com/sqltu/ Instagram: https://www.instagram.com/panday_sanatan_sharma/ Website: https://pandaysanatansharma.blogspot.in/ Agar aapko kuchh samajh me nahi aa rh h to, comment ke through puchh skte h. Thnk u About :Technical Sanatan is a YouTube Channel, Here I post Software and Hardware related Videos.)
Views: 29 Technical Sanatan
Oracle SQL Tutorial 15 - How to Add Primary Key Constraints
 
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The goal of this video is to take the CREATE TABLE statement we have and walk through the different ways to create primary keys. This and foreign keys are the most common constraints, so we need to make sure that you have this one down. Once we have a more complex database design with multiple tables, we will learn the proper way to create foreign keys. For now, I am going to keep all of our constraints at the column level, unnamed. The only exception is the primary key, because that is what we are focusing on in this video. The first way to create the primary key is at the column level, unnamed. The primary key is very important because it what we use to distinguish rows from one another. Every table you create is going to need a primary key, and I suggest putting a lot of effort into making sure your keys are set up correctly and organized. --Delete the table if needed: DROP TABLE users; CREATE TABLE users( user_id NUMBER PRIMARY KEY, username VARCHAR2(50 CHAR) NOT NULL UNIQUE ) The next way is at the column level, but named: --Delete the table: DROP TABLE users; CREATE TABLE users( user_id NUMBER CONSTRAINT users_pk PRIMARY KEY, username VARCHAR2(50 CHAR)NOT NULL UNIQUE ) The general naming convention here is the table name followed by an underscore, followed by pk for primary key. Finally, the third way, which is at the table level, is the way we are going to create our primary key: --Delete the table: DROP TABLE users; CREATE TABLE users( user_id NUMBER, username VARCHAR2(50 CHAR) NOT NULL UNIQUE, CONSTRAINT users_pk PRIMARY KEY (user_id) ) Now, once you've created these constraints, you can use Oracle SQL Developer to find these constraints. Open your databases in the connections tab and find the table in the Tables folder. Double click your table and travel to the Constraints tab. You can tell here that the UNIQUE constraint still exists in this table, but it has a pretty disgusting name. It kind of wants to make me puke. Referencing that constraint in the future with that wacky name would be a burden. Engrave these three options in your head so that you can use any of them whenever you need and can read other peoples' code. Thank you for sticking with the series thus far. In the next video, we will be…doing something. See you then! :) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support me on Patreon! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 14471 Caleb Curry
Dropping Tablesapce in oracle 12c (DIFFERENT METHODS)
 
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The Oracle DROP TABLESPACE command is used to remove a tablespace from the database. In the following example, we will drop the USELESS tablespace from our database using the Oracle DROP TABLESPACE command: Drop tablespace useless; The Oracle DROP TABLESPACE command Oracle will generate an error if objects reside in the tablespace. Do the following to remove all objects in the tablespace prior to using Oracle DROP TABLESPACE command: Drop tablespace useless including contents; Oracle does not clean up after itself wile using the Oracle DROP TABLESPACE command by default. An option exists to force Oracle to clean up after itself using the Oracle DROP TABLESPACE command. The following example illustrates the Oracle DROP TABLESPACE command used with the including contents and datafiles keywords: Drop tablespace useless including contents and datafiles;
Views: 141 Mohammad Taseen
How to solve ORA-01940: cannot drop a user that is currently connected
 
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This video demonstrates how to solve the ORA-01940 cannot drop a user that is currently connected error. This error is raised when we try to drop a user that is connected to the database or having an active connection to the database. We will demonstrate a solution in which we would kill the user that is connected to the oracle database by its serial# and PID. This tutorial will guide viewers on how to kill an active session and then drop the user. If you would like to look at more such videos please visit www.youtube.com/c/kishanmashru Visit our blog at www.oracleplsqlblog.com
Views: 1133 Kishan Mashru
DIFFERENCE BETWEEN PROCEDURE AND FUNCTION IN ORACLE PL/SQL WITH EXAMPLE
 
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The audio and video now synced. This video is a free tutorial on the difference between procedure and a function. The tutorial demonstrates the difference between oracle PL/SQL stored procedure and a function, also it shows the different type of return statement in both of the database objects and various ways to execute a procedure and a function. By learning the difference the users can make an effective judgment on when to use procedure and when to use a function. If you want more such videos of exciting and amazing 'difference between' concepts, check out the links below: union and union all: https://youtu.be/n9FqQOd8liY char and varchar2: https://youtu.be/039qzwjWf4k replace and translate: https://youtu.be/HKYF77BGzOE in and exists: https://youtu.be/REX4IjRYlFw rank and dense_rank: https://youtu.be/WGSX998hZ9M delete and truncate: https://youtu.be/u76wMm2byXo %type and %rowtype: https://youtu.be/MlLUFeZ_3eM
Views: 4454 Kishan Mashru
How to Resolve Oracle SQL Parent Key Not Found (ORA-02291)
 
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In this video, we’ll explain what the ORA-02291 “parent key not found” error is, see an example, and look at how to resolve it. This error usually happens when we try to insert data into a table. It looks like this: Error is: ORA-02291: integrity constraint (constraint_name) violated - parent key not found So what does this error mean? It means we’re trying to insert data into a child table, and there is no related record in the parent table. If a foreign key has been set up to enforce this relationship, there needs to be a parent to insert a child that refers to it. Watch the video to see an example of this error as well as how to resolve it. For more information on Oracle SQL, refer to the Database Star website here: https://www.databasestar.com/
Views: 2386 Database Star
How to use EXISTS / NOT EXISTS Logical Operator in SQL Server -  SQL Server / TSQL Tutorial Part 125
 
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What is Exists / Not Exists Logical Operator in SQL Server Exists returns TRUE if a subquery contains any rows. EXISTS is used when we want to test for the existence of rows specified by a subquery. 1) EXISTS will return TRUE if subquery contains any rows. That is right, if our subquery will return any rows and we have used EXISTS, the outer query is going to return all rows. 2) Use EXISTS and Join with SubQuery Link to scripts used in SQL Server / TSQL Tutorial Video http://www.techbrothersit.com/2016/06/how-to-use-exists-logical-operator-in.html Check out our website for Different SQL Server, MSBI tutorials and interview questions such as SQL Server Reporting Services(SSRS) Tutorial SQL Server Integration Services(SSIS) Tutorial SQL Server DBA Tutorial SQL Server 2016 DBA Tutorial SQL Server / TSQL Tutorial ( Beginner to Advance) http://www.techbrothersit.com/
Views: 7269 TechBrothersIT
views in oracle 11g
 
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What is a VIEW in Oracle? An Oracle VIEW, in essence, is a virtual table that does not physically exist. Rather, it is created by a query joining one or more tables. Create VIEW Syntax The syntax for the CREATE VIEW Statement in Oracle/PLSQL is: CREATE VIEW view_name AS SELECT columns FROM tables [WHERE conditions]; view_name The name of the Oracle VIEW that you wish to create. WHERE conditions Optional. The conditions that must be met for the records to be included in the VIEW. Example Here is an example of how to use the Oracle CREATE VIEW: CREATE VIEW sup_orders AS SELECT suppliers.supplier_id, orders.quantity, orders.price FROM suppliers INNER JOIN orders ON suppliers.supplier_id = orders.supplier_id WHERE suppliers.supplier_name = 'Microsoft'; This Oracle CREATE VIEW example would create a virtual table based on the result set of the SELECT statement. You can now query the Oracle VIEW as follows: SELECT * FROM sup_orders; Update VIEW You can modify the definition of an Oracle VIEW without dropping it by using the Oracle CREATE OR REPLACE VIEW Statement. Syntax The syntax for the CREATE OR REPLACE VIEW Statement in Oracle/PLSQL is: CREATE OR REPLACE VIEW view_name AS SELECT columns FROM table WHERE conditions; view_name The name of the Oracle VIEW that you wish to create or replace. Example Here is an example of how you would use the Oracle CREATE OR REPLACE VIEW Statement: CREATE or REPLACE VIEW sup_orders AS SELECT suppliers.supplier_id, orders.quantity, orders.price FROM suppliers INNER JOIN orders ON suppliers.supplier_id = orders.supplier_id WHERE suppliers.supplier_name = 'Apple'; This Oracle CREATE OR REPLACE VIEW example would update the definition of the Oracle VIEW called sup_orders without dropping it. If the Oracle VIEW did not yet exist, the VIEW would merely be created for the first time. Drop VIEW Once an Oracle VIEW has been created, you can drop it with the Oracle DROP VIEW Statement. Syntax The syntax for the DROP VIEW Statement in Oracle/PLSQL is: DROP VIEW view_name; view_name The name of the view that you wish to drop. Example Here is an example of how to use the Oracle DROP VIEW Statement: DROP VIEW sup_orders; This Oracle DROP VIEW example would drop/delete the Oracle VIEW called sup_orders. Frequently Asked Questions Question: Can you update the data in an Oracle VIEW? Answer: A VIEW in Oracle is created by joining one or more tables. When you update record(s) in a VIEW, it updates the records in the underlying tables that make up the View. So, yes, you can update the data in an Oracle VIEW providing you have the proper privileges to the underlying Oracle tables. Question: Does the Oracle View exist if the table is dropped from the database? Answer: Yes, in Oracle, the VIEW continues to exist even after one of the tables (that the Oracle VIEW is based on) is dropped from the database. However, if you try to query the Oracle VIEW after the table has been dropped, you will receive a message indicating that the Oracle VIEW has errors. If you recreate the table (the table that you had dropped), the Oracle VIEW will again be fine.
SQL tutorials 18: SQL Foreign Key Constraint By Manish Sharma
 
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SQL Tutorial 18: SQL foreign key constraint. Topic covered in this tutorial 1. Defining SQL foreign key using create table at column level 2. Defining SQL foreign key using create table at table level 1. Defining SQL foreign key using Alter Table statement Links Website article: http://www.rebellionrider.com/sql-foreign-key.htm Primary key tutorial: http://www.rebellionrider.com/sql-foreign-key.htm Create Table Tutorial: http://www.rebellionrider.com/sql-create-table.html Tool used in this tutorial is SQL Developer. 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 Foreign key is an Input/output data constraint which is also known as referential integrity constraint. Foreign key represent a link or say a relationship between columns of tables. Similar to primary key constraint Foreign Key constraint is also of two types. Simple Foreign key constraint and Composite Foreign key constraint. Constraint which involves only one column in foreign key in child table and one column in reference key in parent table is called Simple Foreign Key. While the constraint which involves more than one column in foreign key in child table and more than one column in reference key in the parent table is called Composite Foreign Key.
Views: 101424 Manish Sharma
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: 63230 SQL with Manoj
How to drop VIEW in MySQL ?
 
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ySQL Drop VIEW You can drop the VIEW by using the DROP VIEW statement. Syntax: DROP VIEW [IF EXISTS] view_name; Subscribe channel on YouTube:- https://www.youtube.com/channel/UCrp7exVNwPV4lxnc_-X9YTQ/videos Read this post on Blogger:- http://ipctrd.blogspot.in/ Like page on Facebook:- https://www.facebook.com/ipctrd/ Tweet about video on twitter:- https://twitter.com/ipctrd Let's chat on whatsapp:- https://chat.whatsapp.com/BrHbRDvbfs64CulIoLfbjf See you at Instagram :- https://www.instagram.com/ipctrd/ Google+ :- https://plus.google.com/u/0/101013097390807587448
Views: 464 Ipctrd
Select Insert Update Delete Using Stored Procedure in Oracle
 
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Select Insert Update Delete Using Stored Procedure in PLSQL
Views: 31 Adam Tech
PL/SQL tutorial 64: PL/SQL Collection Method Delete in Oracle Database by Manish Sharma
 
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------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog: http://bit.ly/delete-procedure Previous Tutorial ► Collection method Next & Prior https://youtu.be/5Ya35KboF1A ------------------------------------------------------------------------- ►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 http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ ___Facebook Official Page of Manish Sharma___ https://www.facebook.com/TheRebellionRider/ ___Facebook Official Page of RebellionRider.com___ https://www.facebook.com/RebellionRider.official/ You can also Email me at for E-mail address please check the 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: 5114 Manish Sharma
Fix Oracle 11g Admin (system) Password Forget | Start with SQL - create ,alter and drop command !
 
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Hey guys, In this video we learn about some very important initial required commands working with Oracle SQL.It also fix the problem of forgotten password of system user of Oracle 11g . We learn about three basic command of SQL that is-- create -- It is used for creating the new user in SQL database. alter -- It is used for changing the password of the user.If you forget the password then it is very important for us. drop -- It is used for deleting user which is already exists. We also use grant command to give permission for particular user. This is also useful for starting with Oracle SQL. This is Abhishek Saxena.This channel is about to solve problem which we faces generally in our daily life.Some times it take a long time to solve it.But we provide a easy solution for these problem.If you like then support us by share and subscribe our channel also press the Bell icon.Thank you for your support.
Views: 85 saxena4you
PL/SQL tutorial 84: ALTER & DROP table DDL with Execute Immediate of Dynamic SQL
 
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Learn how to modify and delete a table using ALTER and DROP TABLE DDL with EXECUTE IMMEDIATE of native dynamic SQL in Oracle Database by Manish Sharma from RebellionRider.com 02:12 ALTER TABLE with Execute Immediate 04:48 DROP TABLE with Execute Immediate ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog: http://bit.ly/nds-5 Previous Tutorial ► PL/SQL Tutorial 83 https://youtu.be/dl39itjrWYw ► Facebook Note Ora--12505 TNS error http://bit.ly/Ora-12505 ------------------------------------------------------------------------- ►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 http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ ___Facebook Official Page of Manish Sharma___ https://www.facebook.com/TheRebellionRider/ ___Facebook Official Page of RebellionRider.com___ https://www.facebook.com/RebellionRider.official/ You can also Email me at for E-mail address please check the 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: 2516 Manish Sharma
Oracle Database11g tutorials 16: How to uninstall oracle 11g from windows 7 64 bit
 
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How To Properly Uninstall oracle database 11g from windows 7 and 8 manually without formatting your Computer By Manish Sharma Rebellion Rider Blog Link http://bit.ly/uninstall-oracle-11g-from-win-7 Website: www.RebellionRider.com Manual Un-Installation of Oracle Database 11g. This video will show you proper process on uninstalling Oracle database 11g from windows 7 64 bit. How to uninstall oracle 11g on windows 7 / How to uninstall oracle 10g on windows 7 Read How to uninstall oracle 11g on windows http://www.rebellionrider.com/how-to-uninstall-oracle-database-11g-from-windows-7.html YouTube Video on How to create database http://bit.ly/create-database-using-DBCA 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
Views: 250431 Manish Sharma
Difference Between Case and Decode
 
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What is the difference between case and decode ? Important links for Oracle Developers For for SQL - PL/SQL Interview Questions Answers Facebook group https://www.facebook.com/groups/146487615764170/ Download Free PLSQL Interview Books , Documents Videos from here https://www.facebook.com/groups/146487615764170/files/ Free SQL / PLSQL Video on YouTube Channel SUBSCRIBE https://www.youtube.com/c/ramguptaoracle?sub_confirmation=1 Visit oracle forms / report / SQL PLSQL blog http://oracletemple.blogspot.in/ Oracle Community Google+ https://plus.google.com/u/0/collection/4mW-jB Join our facebook group https://www.facebook.com/groups/146487615764170/ Follow us on Twitter https://twitter.com/Rameshwar275 Simply Like and Share :) Oracle SQL PLSQL FaceBook group https://www.facebook.com/groups/146487615764170/ ORACLE SQL PLSQL VIDEO LINKS What is Parameterized Cursor in Oracle https://www.youtube.com/watch?v=JMKwHlVi6-A What is autonomous transaction in Oracle. https://www.youtube.com/watch?v=gyvFajpfoWE What are Constraints available in Oracle. https://www.youtube.com/watch?v=WivhdLXQklQ What is Mutation Error and How to avoid mutation. https://www.youtube.com/watch?v=CbWNCyW18Bs 5 Effective way to delete Duplicate rows https://www.youtube.com/watch?v=1wtTtnc87Oc What is Difference between Delete and Truncate https://www.youtube.com/watch?v=7b6wQ3Qumgg What are types of View available in Oracle https://www.youtube.com/edit?o=U&video_id=PN-NsSA2R-E
Views: 3859 Ram Gupta
UNION AND UNION ALL SET OPERATOR IN ORACLE SQL WITH EXAMPLE
 
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This video is to understand the difference between union and union all set operations. Along with that we have also showed some simple solution to the 'ORA-01789: query block has incorrect number of result columns' error message. If you want more such videos of exciting and amazing 'difference between' concepts, check out the links below : char and varchar2 : https://youtu.be/039qzwjWf4k replace and translate : https://youtu.be/HKYF77BGzOE procedure and function : https://youtu.be/q3LmOenL120 in and exists : https://youtu.be/REX4IjRYlFw rank and dense_rank : https://youtu.be/WGSX998hZ9M delete and truncate : https://youtu.be/u76wMm2byXo %type and %rowtype : https://youtu.be/MlLUFeZ_3eM
Views: 609 Kishan Mashru
Oracle SQL Tutorial 22 - Why Primary Keys Shouldn't Change
 
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In the last video I mentioned that with our database design it is important to make sure that nobody tries to update a user's username. What happens if they do? Nothing horrible, Oracle will just throw an error. That's not such a big deal, but if you are hoping to make some kind of application that allows someone to change their username, this is not the best set up. Why? If you look at the projects table, we have a foreign key that references the username. Let's assume for a moment that Oracle allows you to do anything with your data. That means that if a user updates their username, there will be projects created by users that don't exist. Or a user could change their name to the previous owner. To fix this problem, we would need something such as an ON UPDATE CASCADE command for our foreign key. That would mean that if the user updated their username, the columns that reference that username would also update to the new value. This exists in some database management systems, but this does not exist in Oracle at the time of this video. How do we get around this problem? I'm sure we could conjure up something to allow us to update the username, but the easiest solution is to reference the user_id instead of the username. That way, when the username is updated, nothing changes inside of the foreign key. As a general rule, primary keys should never change. Foreign keys CAN change, but they should not change because a primary key changed. So, if we did happen to use a username as a column, it would be frowned upon if the username had to change because the column it references changes. However, it would be acceptable to change the foreign key if we needed to point to a new entity in the users table. Even if a username is never intended to change, these complications bother a lot of people. You can mitigate these problems by only referencing surrogate keys in foreign keys. This has the downside though that when you retrieve the data, you are going to have to do more work to make the data readable. For example, we had a table that was called project_users. It is essentially a table that says what users are part of what projects. We could have the foreign keys reference the project's name and the user's username. Then when you could say SELECT * FROM project_users. The data would be completely readable without doing anything. If you switch to only referencing surrogate primary keys, you will have a bunch of random numbers that don't mean anything and will have to be joined with other tables…which is really super frustrating when later you have to join a thousand tables to read anything. Which side do you prefer? Pick a side. Choose wisely. I'll see you all in the next video ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ HELP ME! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 5658 Caleb Curry
MSSQL - Understanding Isolation Level By Example (Serializable)
 
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Example SQL Statements below used in the video, you can Copy and Paste for Transaction Isolation Level of Serializable, Read Committed, Read Uncommitted, Repeatable Read --===================================== -- Windows/Session #1 --===================================== SELECT @@SPID IF EXISTS (SELECT 1 FROM sys.tables WHERE name = 'SampleTable') DROP TABLE SampleTable CREATE TABLE [SampleTable] ( [Id] [int] IDENTITY(1,1) NOT NULL, [Name] [varchar](100) NULL, [Value] [varchar](100) NULL, [DateChanged] [datetime] DEFAULT(GETDATE()) NULL, CONSTRAINT [PK_SampleTable] PRIMARY KEY CLUSTERED ([Id] ASC) ) INSERT INTO SampleTable(Name, Value) SELECT 'Name1', 'Value1' UNION ALL SELECT 'Name2', 'Value2' UNION ALL SELECT 'Name3', 'Value3' SELECT * FROM SampleTable BEGIN TRAN INSERT INTO SampleTable(Name, Value) VALUES('Name4', 'Value4') --UPDATE SampleTable SET Name = Name + Name --UPDATE SampleTable SET Name = Name + Name WHERE Name = 'Name1' UPDATE SampleTable SET Name = Name + Name WHERE ID = 2 DELETE FROM SampleTable WHERE ID = 4 WAITFOR DELAY '00:0:10' COMMIT TRAN --===================================== -- Windows/Session #2 --===================================== --------------------------------------------------- -- This window/session is default READ COMMITTED -- --------------------------------------------------- SELECT @@SPID BEGIN TRAN SELECT * FROM SampleTable WAITFOR DELAY '00:00:10' SELECT * FROM SampleTable WAITFOR DELAY '00:00:10' SELECT * FROM SampleTable ROLLBACK SELECT b.name, c.name, a.* FROM sys.dm_tran_locks a INNER JOIN sys.databases b ON a.resource_database_id = database_id INNER JOIN sys.objects c ON a.resource_associated_entity_id = object_id --===================================== -- Windows/Session #3 --===================================== ----------------------------------------------------- -- This window/session is REPEATABLE READ -- ----------------------------------------------------- SELECT @@SPID SET TRANSACTION ISOLATION LEVEL REPEATABLE READ BEGIN TRAN SELECT * FROM SampleTable WAITFOR DELAY '00:00:10' SELECT * FROM SampleTable WAITFOR DELAY '00:00:10' SELECT * FROM SampleTable COMMIT TRAN --===================================== -- Windows/Session #4 --===================================== ----------------------------------------------------- -- This window/session is SERIALIZABLE -- ----------------------------------------------------- SELECT @@SPID SET TRANSACTION ISOLATION LEVEL SERIALIZABLE BEGIN TRAN SELECT * FROM SampleTable WAITFOR DELAY '00:00:10' SELECT * FROM SampleTable WAITFOR DELAY '00:00:10' SELECT * FROM SampleTable COMMIT TRAN
Views: 12761 CodeCowboyOrg
SQL Tutorial : Difference Between Case & Decode in SQL Oracle
 
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SQL Tutorial : Difference Between Case & Decode in SQL Difference Between Case and Decode in oracle SQL Tutorial SQL Tutorial for beginners PLSQL Tutorial PLSQL Tutorial for beginners PL/SQL Tutorial PL SQL Tutorial PL SQL Tutorial for beginners PL/SQL Tutorial for beginners Oracle SQL Tutorial
Views: 1188 TechLake
How to drop Foreign Key Constraints in SQL Server Database for all the tables -  SQL Server  Part 72
 
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SQL Server / T-SQL Tutorial Scenario: You are working as SQL Server developer, you are asked to provide the scripts those can be used to drop Foreign Key Constraints on all the tables in a database if exists. Link to scripts used in SQL Server / TSQL Tutorial Video http://www.techbrothersit.com/2016/04/how-to-drop-foreign-key-constraints-in.html Check out our website for Different SQL Server, MSBI tutorials and interview questions such as SQL Server Reporting Services(SSRS) Tutorial SQL Server Integration Services(SSIS) Tutorial SQL Server DBA Tutorial SQL Server / TSQL Tutorial ( Beginner to Advance) http://www.techbrothersit.com/
Views: 2380 TechBrothersIT
SQL Server 27 - How to Create FOREIGN KEY Constraints
 
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In the previous video we set up an entire table. The problem with this table is that the species column is just plain text. The problem with this is that there is a higher probability of incorrect data and if we have tons of animals in here there will be a lot of redundant information. The solution to this is to change this species to a foreign key to another table. Remember that when you create a foreign key it is a child to a parent. The thing you need to know is that the parent has to exist before the child so the child has something to reference. So let's create the parent table. CREATE TABLE Species( ID INT PRIMARY KEY IDENTITY, Species VARCHAR(50) NOT NULL UNIQUE, FriendlyName VARCHAR(50) NOT NULL //NOT UNIQUE because multiple rows could be same category (Ex: Bunny) ); Now, the friendly name will likely have redundant data, so maybe later we can add a table for animal categories or something, but let's not overwhelm ourselves quite yet. Maybe in a few videos. Now that we have created that table, we can recreate the table that references it. The first thing to know when creating a foreign key is that the data type must match. Because the ID column in the species table is of type INT, we should make our Species column in the Animals table also of type INT. Secondly, to make this a foreign key we add REFERENCES Species(ID) to the Species column. DROP TABLE IF EXISTS Animals; CREATE TABLE Animals( ID INT PRIMARY KEY IDENTITY, Name VARCHAR(50) NOT NULL, Species INT NOT NULL REFERENCES Species(ID), ContactEmail VARCHAR(50) NOT NULL UNIQUE ); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support me! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 5384 Caleb Curry
VIEWS IN ORACLE SQL WITH EXAMPLES
 
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This video explains about views in Oracle SQL, views are integral part of any database, and its important to clearly understand views to work with them. Views are named and stored sql statements which would be executed once we call the view, views in whole do not store the data except if its a Materialized view. Views are widely used in day to day programming and can be useful in various cases, we discussed about all those cases in this video. If you would like to learn more on materialized view, visit the below videos https://youtu.be/7PklhTCNxxw https://youtu.be/EDf8Pk-x_nA If you want to know the difference between views and Materialized view, visit https://youtu.be/BnNKws_7_jc Visit our blog at www.oracleplsqlblog.com All out youtube videos: www.youtube.com/c/kishanmashru
Views: 1408 Kishan Mashru
What is Schema in SQL Server & How to Create or Drop Schema - SQL Server / T-SQL Tutorial Part 27
 
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SQL Server / TSQL Tutorial : What is Schema in SQL Server & How to Create or Drop Schema Link to the script used in the video http://www.techbrothersit.com/2016/02/what-is-schema-in-sql-server-and-how-to.html What is Schema : As per Microsoft website : A Schema is distinct namespace to facilitate the separation, management, and ownership of database objects. How to create Schema by GUI: Open the SSMS and you will be going to Database as Schema are objects in the database. Go to Security and then Go to Schema and Right Click and Choose New Schema as shown below. Now you need to provide the Schema name. I used TB as Schema Name and I left the Schema Owner empty, that means that dbo will be owner for this schema. If you would like to choose owner, you can hit search and provide the owner of schema. Create Schema by using TSQL : To create Schema in Database with default owner that is dbo, you can use below script. --DatabaseName=TechBrothersIT USE [TechBrothersIT] GO --Create Schema Name =TB CREATE SCHEMA [TB] GO Let's say If I have a user in TechbrothersIT Database with name [aamir] and I would like to create Schema TB with owner name =[aamir]. I can use below script. --Database Name = TechBrothersIT USE [TechBrothersIT] GO --Create Schema TB with owner name =Aamir ( Database User) CREATE SCHEMA [TB] AUTHORIZATION [aamir] GO How to Drop Schema from SQL Server Database: We can also use TSQL Script to drop the Schema from a SQL Server Database. In below example, I am deleting TB Schema from TechBrothersIT Database. --Database Name = TechBrothersIT USE [TechBrothersIT] go --Drop Schema TB Drop Schema [TB] Check out our website for Different SQL Server, MSBI tutorials and interview questions such as SQL Server Reporting Services(SSRS) Tutorial SQL Server Integration Services(SSIS) Tutorial SQL Server DBA Tutorial SQL Server / TSQL Tutorial ( Beginner to Advance) http://www.techbrothersit.com/
Views: 28567 TechBrothersIT
DIFFERENCE BETWEEN CHAR AND VARCHAR2 DATATYPE IN ORACLE SQL
 
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This video tutorial explains the difference between similar looking and used char datatype and varchar2 datatypes with an simple example. This video will answer the question such as how is the data internally stored differently for char and vacchar2 datatype. Also why is varchar2 much better option to be used than char data type is explained. If you want more such videos of exciting and amazing 'difference between' concepts, check out the links below : union and union all : https://youtu.be/n9FqQOd8liY replace and translate : https://youtu.be/HKYF77BGzOE procedure and function : https://youtu.be/q3LmOenL120 in and exists : https://youtu.be/REX4IjRYlFw rank and dense_rank : https://youtu.be/WGSX998hZ9M delete and truncate : https://youtu.be/u76wMm2byXo %type and %rowtype : https://youtu.be/MlLUFeZ_3eM
Views: 3074 Kishan Mashru
MySQL alter table drop index
 
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MySQL alter table drop index, borra el indice asociado a una tabla
Views: 1004 Francisco Arce
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: 247358 The Bad Tutorials
Oracle Database Tutorial 9: The "and" and "or" Operator In Sql
 
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sql series playlist ===)https://www.youtube.com/watch?v=-ixZ4YQ4Uco&list=PL7nQsQekG89yNvQUtbPa4gLeZlprYUr54 SQL Select Top SQL Min and Max SQL Count, Avg, Sum SQL Like SQL Wildcards SQL In SQL Between SQL Aliases SQL Joins SQL Inner Join SQL Left Join SQL Right Join SQL Full Join SQL Self Join SQL Union SQL Group By SQL Having SQL Exists SQL Any, All SQL Select Into SQL Insert Into Select SQL Null Functions SQL Comments SQL Database SQL Create DB SQL Drop DB SQL Create Table SQL Drop Table SQL Alter Table SQL Constraints SQL Not Null SQL Unique SQL Primary Key SQL Foreign Key SQL Check SQL Default SQL Index SQL Auto Increment SQL Dates SQL Views SQL Injection SQL Hosting SQL References MySQL Functions SQL Server Functions MS Access Functions Oracle Functions SQL Operators SQL Data Types SQL Quick Ref SQL Quiz SQL Quiz SQL AND, OR and NOT Operators The SQL AND, OR and NOT Operators The WHERE clause can be combined with AND, OR, and NOT operators. The AND and OR operators are used to filter records based on more than one condition: The AND operator displays a record if all the conditions separated by AND is TRUE. The OR operator displays a record if any of the conditions separated by OR is TRUE. The NOT operator displays a record if the condition(s) is NOT TRUE. sql multiple or sql like not in operator in sql sql order by sql update sql not in sql where not equal
3  alter table
 
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Video from our Oracle SQL course. Check out the full course at.. http://learn.hackpress.co/courses/oracle-sql-learning-by-example
Views: 373 etldeveloper
How to Grant Drop/Create Table Permission to a User in MariaDB - MariaDB Admin Tutorial
 
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How to Grant Drop/Create Table Permission to a User in MariaDB demo explains all the steps which are required to provide Drop table or create table permission to user in MariaDB. To check the scripts used in the video http://techbrotherstutorials.com/pages/tutorials/MariaDB%20Administration%20_126/How%20to%20Grant%20DropCreate%20Table%20Permission%20to%20a%20User%20in%20MariaDB_1017 Check out our website for Different SQL Server, MSBI tutorials and interview questions such as MairaDB Admin Tutorial Cassandra CSQL Tutorial SQL Server Reporting Services(SSRS) Tutorial SQL Server Integration Services(SSIS) Tutorial SQL Server DBA Tutorial SQL Server / TSQL Tutorial ( Beginner to Advance) http://www.techbrothersit.com/
Views: 243 TechBrothersIT
Row Number Vs Rank Vs Dense Rank
 
07:04
This video shows the difference between row_number, rank and dense_rank analytical functions in oracle database with appropriate easy to understand examples, along with it the video demonstrates the different output obtained when using either of the three functions. Apart from simple explanation of the function we also show how partition by and order by clause can be used with the functions for tacking day to day scenarios. If you want more such videos of exciting and amazing 'difference between' concepts, check out the links below : union and union all : https://youtu.be/n9FqQOd8liY char and varchar2 : https://youtu.be/039qzwjWf4k replace and translate : https://youtu.be/HKYF77BGzOE procedure and function : https://youtu.be/q3LmOenL120 in and exists : https://youtu.be/REX4IjRYlFw delete and truncate : https://youtu.be/u76wMm2byXo %type and %rowtype : https://youtu.be/MlLUFeZ_3eM
Views: 2498 Kishan Mashru
CREATE/DROP TABLE MySQL Workbench
 
04:30
Enkelt eksempel på hvordan man oppretter og fjerner en tabell. Eksempelet viser kjøring av SQL direkte, og også via MySQL Workbench GUI.
Views: 297 Per Lauvås
how to remove duplicates form a table in oracle
 
02:43
removing of duplicates using sql querries
Views: 126 informatica
sql tutorial   learn how to use alter table drop and modify column in mysql in urdu and hindi
 
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the sql tutorial learn how to use alter table drop and modify column in mysql in urdu and hindi will teach you alter command in different way for more mohammad fayyaz video tutorial go to http://vdotutorials.com/ sql tutorial alter table will help you more you must watch our previous sql tutorial , this tutorial will helps you to understand sql alter table query in different way you can modify and delete structure of database keep watching urdu video lectures

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