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Hash Join
 
04:05
#Oracle #HashJoin How a Hash Join is executed
Views: 1494 Hemant K Chitale
SQL Joins, nested loops and all that in less than 6 minutes
 
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CAPTIONS AVAILABLE - Full transcript (with some screenshots) available for a small fee at http://stores.lulu.com/konagora/. A very brief description of how a database performs a join, based on material from a 2-day seminar.
Views: 76041 roughsealtd
What is the hash join in Oracle
 
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What is the hash join in Oracle - Find out more explanation for : 'What is the hash join in Oracle' only from this channel. Information Source: google
Views: 97 atunakai8c
Database Engine and Join Algorithms
 
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Animated demonstration of how the database engine and join algorithms: nested loop, merge scan, hash joins work. For free SQL Server query health check, go to: www.sqlprofiler.com
Views: 21547 SQLProfiler.com
AskTOM Office Hours: Hash Joins and Database In-Memory
 
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Held on April 20 2018 Andy Rivenes (@TheInMemoryGuy) and Maria Colgan (@SQLMaria) focused on a deep dive into hash joins and how they are used with Database In-Memory to make joins lightning fast. The session began by reviewing how traditional hash joins work and then addressed Bloom filters and how Database In-Memory uses them to effectively turn hash joins into scan and filter operations. The use of Join Groups was then discussed as a way to further enhance join performance in 12.2 and beyond. AskTOM Office Hours offers free, monthly training and tips on how to make the most of Oracle Database, from Oracle product managers, developers and evangelists. https://asktom.oracle.com/ Oracle Developers portal: https://developer.oracle.com/ Sign up for an Oracle Cloud trial: https://cloud.oracle.com/en_US/tryit music: bensound.com
Views: 284 Oracle Developers
14.412 Simple Hash Join
 
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My book "Patterns in Data Management" is now available both as an ebook or a print book (with color graphics!). See: http://amzn.to/1Ts3rwx This book is not a standard textbook on database techniques. This book was written extending and complementing preexisting educational videos (including this one). Video for my inverted classroom "Database Systems". The complete list of videos, slides, and additional material is (will be) available at http://datenbankenlernen.de Computer Science, Saarland University: Bachelor (in German): http://www.cs.uni-saarland.de/index.p... Master (in English): http://www.cs.uni-saarland.de/index.p... Ph.D./Grad School: http://gradschool.cs.uni-saarland.de/
T-SQL: JOIN OPERATORS - NESTED LOOP JOIN, MERGE JOIN AND HASH JOIN
 
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In this video, I will describe the 3 Join Operators SQL Server uses and the reason why it comes to the individual selections by the Optimizer. Please check my blog azizsharif.blogspot.com for more videos!
SQL Server Quickie #13 - Hash Join Operator
 
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In this SQL Server Quickie I'm talking about the Hash Join operator in SQL Server. You can find the scripts that were used for the demonstration here: http://www.sqlpassion.at/archive/2014/04/29/sql-server-quickie-13-hash-join-operator/
Views: 11757 SQLpassion
Hash Partitioning in Oracle
 
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The Video explains Hash partitioning in oracle and how it focuses on equal data distribution. It explains how hash partitioning uses partition joins to improve performance in VLDB by MPP.
Views: 4216 Tech Coach
14.452 Double-Pipelined Hash Join, Relationship to Index Nested-Loop Join
 
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Video for my inverted classroom "Database Systems". The complete list of videos, slides, and additional material is (will be) available at http://datenbankenlernen.de Computer Science, Saarland University: Bachelor (in German): http://www.cs.uni-saarland.de/index.php?id=52&L=1 Master (in English): http://www.cs.uni-saarland.de/index.php?id=132&L=1 Ph.D./Grad School: http://gradschool.cs.uni-saarland.de/
Hash Join
 
01:25
Views: 10687 mrjazzs
14.416 Sort-Merge Join, Co-Grouping
 
18:31
My book "Patterns in Data Management" is now available both as an ebook or a print book (with color graphics!). See: http://amzn.to/1Ts3rwx This book is not a standard textbook on database techniques. This book was written extending and complementing preexisting educational videos (including this one). Video for my inverted classroom "Database Systems". The complete list of videos, slides, and additional material is (will be) available at http://datenbankenlernen.de Computer Science, Saarland University: Bachelor (in German): http://www.cs.uni-saarland.de/index.p... Master (in English): http://www.cs.uni-saarland.de/index.p... Ph.D./Grad School: http://gradschool.cs.uni-saarland.de/
Hash Partition in Oracle
 
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This course has been designed to impart the in-depth knowledge about the partitioning types and architecture in the Oracle RDBMS. For more information on this course, please visit https://www.koenig-solutions.com/oracle-database-12-c-implement-partitioning-training.aspx
Views: 52 Koenig Solutions
SQL Server Quickie #12 - Nested Loop Operator
 
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In this SQL Server Quickie I'm talking about the Nested Loop operator in SQL Server. You can find the scripts that were used for the demonstration here: http://www.sqlpassion.at/archive/2014/03/31/sql-server-quickie-12-nested-loop-operator
Views: 6746 SQLpassion
SQL Advanced Videos REUPLOAD #3: Nested Loop Join
 
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I talk about the first of three physical #join operator. We begin with #NestedLoopJoin, the most simple and known physical JOIN Operator in #SQL. This is a re-upload of my old video due to many complaints about the annoying background music. Join my discord: https://discord.gg/5aWE33f
Views: 431 SQL TV
Focus on Hash Joins - Using Database In-Memory
 
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Ask TOM Office Hours demo - Focus On Hash Joins This demonstration reviews how Database In-Memory uses Hash Joins and Bloom filters to provide up to a 10x performance improvement. You can see the full session and join us for more Office Hours sessions at https://asktom.oracle.com/pls/apex
Joins in Oracle
 
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This is a demo intro video about Oracle and Joins in oracle to understand how we teach our students.
11g Nested Loop
 
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#Oracle #NestedLoop 11g Enhancement
Views: 652 Hemant K Chitale
Oracle Hints Tutorial for improving performance
 
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Oracle Hints Tutorial for improving performance APPEND PARALLEL JOIN INDEX NO_INDEX SELECT /*+ FIRST_ROWS(10) */ * FROM emp WHERE deptno = 10; SELECT /*+ ALL_ROWS */ * FROM emp WHERE deptno = 10; SELECT /*+ NO_INDEX(emp emp_dept_idx) */ * FROM emp, dept WHERE emp.deptno = dept.deptno; SELECT /*+ INDEX(e,emp_dept_idx) */ * FROM emp e WHERE e.deptno = 10; -- SELECT /*+ INDEX(scott.emp,emp_dept_idx) */ * FROM scott.emp; SELECT /*+ AND_EQUAL(e,emp_dept_idx) */ * FROM emp e; SELECT /*+ INDEX_JOIN(e,emp_dept_idx) */ * FROM emp e; SELECT /*+ PARALLEL_INDEX(e,emp_dept_idx , 8) */ * FROM emp e; SELECT /*+ LEADING (dept) */ * FROM emp, dept WHERE emp.deptno = dept.deptno; SELECT /*+ PARALLEL(8) CACHE (e) FULL (e) */ * FROM emp e ; SELECT /*+ PARALLEL FULL (e) */ * FROM emp e ; SELECT /*+ PARALLEL USE_MERGE (emp dept) */ * FROM emp, dept WHERE emp.deptno = dept.deptno; -- SORT Merge Join SELECT /*+ PARALLEL USE_HASH (emp dept) */ * FROM emp, dept WHERE emp.deptno = dept.deptno; -- Hash Join SELECT /*+ PARALLEL */ * FROM emp e ; INSERT /*+ APPEND */ INTO mytmp select /*+ CACHE (e) */ *from emp e; commit;
Views: 5037 TechLake
Oracle SQL Join Tutorials
 
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Oracle SQL Join Tutorials. Different types of joins and examples. For Full Course Experience Please Go To http://mentorsnet.org/course_preview?course_id=4 Full Course Experience Includes 1. Access to course videos and exercises 2. View & manage your progress/pace 3. In-class projects and code reviews 4. Personal guidance from your Mentors
Views: 101681 Oresoft LWC
Oracle - Joins - Beginner
 
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Oracle - Joins - Beginner
Views: 26256 Chris Ostrowski
Nested loop join
 
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I created this video with the YouTube Video Editor (http://www.youtube.com/editor)
Views: 3928 Olivier Berthommé
Parallel Hash Join
 
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Views: 529 CS186Berkeley
What is the HASH PARTITION in Oracle ?
 
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Hi guys in my today scenario I'm going to explain with you What is the HASH PARTITION in Oracle, Oracle database Unbeatable,Unbreakable Platform.. #WhatisHASHPARTITION
Views: 7205 Oracle World
Query Processing - Block Nested Loop Join, Index Nested Loop Join, Merge Join, Hash Join
 
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Complete set of Video Lessons and Notes available only at http://www.studyyaar.com/index.php/module/28-query-processing-and-optimization Block Nested Loop Join, Index Nested Loop Join, Merge Join, Hash Join http://www.studyyaar.com/index.php/module-video/watch/72-query-processing-more-join-algorithms
Views: 25350 StudyYaar.com
14.410 Applications of Join Algorithms, Nested-Loop Join, Index Nested-Loop Join
 
12:04
My book "Patterns in Data Management" is now available both as an ebook or a print book (with color graphics!). See: http://amzn.to/1Ts3rwx This book is not a standard textbook on database techniques. This book was written extending and complementing preexisting educational videos (including this one). Video for my inverted classroom "Database Systems". The complete list of videos, slides, and additional material is (will be) available at http://datenbankenlernen.de Computer Science, Saarland University: Bachelor (in German): http://www.cs.uni-saarland.de/index.p... Master (in English): http://www.cs.uni-saarland.de/index.p... Ph.D./Grad School: http://gradschool.cs.uni-saarland.de/
What is a Hash Partition in Oracle
 
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What is a Hash Partition 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: 712 TechLake
Three SQL Server join operators in three minutes
 
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This is a quick overview of the three types of join operators you'll find in a SQL Server execution plan; the Hash Match, the Nested Loop Join and the Merge Join. Check out my blog, https://sqlsunday.com/ or follow me on twitter: https://twitter.com/dhmacher
Focus on Hash Joins - Join Groups
 
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Ask TOM Office Hours demo - Focus On Hash Joins This demonstration reviews how Database In-Memory can use Join Groups to further improve hash join performance. You can see the full session and join us for more Office Hours sessions at https://asktom.oracle.com/pls/apex/f?p=100:551:::NO:551:P551_CLASS_ID:3843:
11 of 15 SQL Basics with Oracle - Using two or more tables in a query
 
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This video explains how to get data from 2 or more tables. Two methods are explained: the WHERE clause and the JOIN operator. Examples of each are shown. (11 of 15) There is also an "Advanced SQL" series. (Search for "databasemec" for tutorials using SQL Server.)
Views: 3009 Jennifer Kreie
Semi Join in Oracle Database
 
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Oracle Semi Join
Views: 40 Adam Tech
Join Methods: Nested Loop, Hash, Sort, Merge, Adaptive
 
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Here is a replay of the live demo I did at POUG 2018 to explain the join methods. sql monitor to show the execution plan in real time and gdb breakpoints to stop on the different operations. I'll do the same at DOAG and maybe more. Follow https://medium.com/@FranckPachot/conferences-2018-7b821155591 to be informed.
Views: 279 Franck Pachot
A Story of Indexes and Full Table Scans: Finding All the Red Sweets Part 1
 
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"Why isn't Oracle using my index?!" is a common question people have when tuning SQL queries. In this episode Chris compares two methods for finding all the red candies from party bags he's prepared. He shows how these are like a full table scan and an index range scan. He goes on to compare the performance of these two approaches. He shows when a full table scan becomes more efficient than an index range scan and vice versa. ============================ 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: 7517 The Magic of SQL
Oracle Tutorial - HASH partition step by step part - 3 ✓
 
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In this video i'm discus with you how to create hash partition in oracle step by step. #hash #partition #oracletutorial #oracle website:- www.ocptechnology.com #oracle12c
Views: 3013 OCP Technology
Focus on Hash Joins - Multiple Bloom Filters
 
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Ask TOM Office Hours demo - Focus On Hash Joins This demonstration reviews how Database In-Memory can use multiple Bloom filters to provide up to a 10x performance improvement. You can see the full session and join us for more Office Hours sessions at https://asktom.oracle.com/pls/apex
What to choose for performance   SubQuery or Joins   Part 62
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2013/01/what-to-choose-for-performance.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-62-what-to-choose-for-performance.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 What to choose for performance - SubQuery or Joins According to MSDN, in sql server, in most cases, there is usually no performance difference between queries that uses sub-queries and equivalent queries using joins. For example, on my machine I have 400,000 records in tblProducts table 600,000 records in tblProductSales tables The following query, returns, the list of products that we have sold atleast once. This query is formed using sub-queries. When I execute this query I get 306,199 rows in 6 seconds Select Id, Name, Description from tblProducts where ID IN ( Select ProductId from tblProductSales ) At this stage please clean the query and execution plan cache using the following T-SQL command. CHECKPOINT; GO DBCC DROPCLEANBUFFERS; Go DBCC FREEPROCCACHE; GO Now, run the query that is formed using joins. Notice that I get the exact same 306,199 rows in 6 seconds. Select distinct tblProducts.Id, Name, Description from tblProducts inner join tblProductSales on tblProducts.Id = tblProductSales.ProductId Please Note: I have used automated sql script to insert huge amounts of this random data. Please watch Part 61 of SQL Server tutorial, in which we have discussed about this automated script. According to MSDN, in some cases where existence must be checked, a join produces better performance. Otherwise, the nested query must be processed for each result of the outer query. In such cases, a join approach would yield better results. The following query returns the products that we have not sold atleast once. This query is formed using sub-queries. When I execute this query I get 93,801 rows in 3 seconds Select Id, Name, [Description] from tblProducts where Not Exists(Select * from tblProductSales where ProductId = tblProducts.Id) When I execute the below equivalent query, that uses joins, I get the exact same 93,801 rows in 3 seconds. Select tblProducts.Id, Name, [Description] from tblProducts left join tblProductSales on tblProducts.Id = tblProductSales.ProductId where tblProductSales.ProductId IS NULL In general joins work faster than sub-queries, but in reality it all depends on the execution plan that is generated by SQL Server. It does not matter how we have written the query, SQL Server will always transform it on an execution plan. If sql server generates the same plan from both queries, we will get the same result. I would say, rather than going by theory, turn on client statistics and execution plan to see the performance of each option, and then make a decision. In a later video session we will discuss about client statistics and execution plans in detail.
Views: 83581 kudvenkat
SQL: Explain Plan for knowing the Query performance
 
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In this tutorial, you'll learn how to compare queries to know the better performance query..
Views: 93112 radhikaravikumar
Oracle   joins Part -4 by dinesh
 
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DURGASOFT is INDIA's No.1 Software Training Center offers online training on various technologies like JAVA, .NET , ANDROID,HADOOP,TESTING TOOLS , ADF, INFORMATICA,TABLEAU,IPHONE,OBIEE,ANJULAR JS, SAP... courses from Hyderabad & Bangalore -India with Real Time Experts. Mail us your requirements to [email protected] so that our Supporting Team will arrange Demo Sessions. Ph:Call +91-8885252627,+91-7207212428,+91-7207212427,+91-8096969696. http://durgasoft.com http://durgasoftonlinetraining.com https://www.facebook.com/durgasoftware http://durgajobs.com https://www.facebook.com/durgajobsinfo............
Microsoft SQL Server Merge Join
 
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Microsoft SQL Server Merge Join
Views: 5122 Alex Rosa
Joins in Oracle (Tested in Oracle 12c)
 
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Learn various SQL syntax of joins in ORACLE.
Views: 342 Vinay Singh
PL/SQL Tutorial 17-NESTED LOOP  in (PL/SQL)Oracle Database By JavaInHand (in Hindi)
 
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NESTED LOOP IN PL/SQL? ---------------------------------------- SYNTAX OF NESTED TABLE IN PL/SQL -------------------------------------------------------------- EXAMPLE OF NESTED LOOP IN PL/QL
Views: 477 JavaInHand
Joins in SQL Server Execution Plans
 
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Understanding the different join types and where they apply is an important part of reading and understanding execution plans in SQL Server. I introduce the four joins; nested loops, hash, merge and adaptive. For more on adaptive joins, here's another video I made: https://youtu.be/Oxj3HilCnko #sqlserver #performancetuning #executionplan -~-~~-~~~-~~-~- Please watch: "Extended Events Live Data Window " https://www.youtube.com/watch?v=UDtXjewvqmM -~-~~-~~~-~~-~-
Views: 134 Grant Fritchey
Learn Oracle | How to Use Joins, Cross Join, Cartesian Product in SQL
 
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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: 3660 Pebbles Tutorials
5. Базы данных. Индексы и производительность | Технострим
 
02:40:56
Слайды лекции: https://bozaro.github.io/tech-db-lectures/05/ ► Другие лекции курса: https://www.youtube.com/playlist?list=PLrCZzMib1e9oOFQbuOgjKYbRUoA8zGKnj Подробнее о курсе: https://park.mail.ru/curriculum/program/discipline/218/ Лекция читается в рамках образовательного проекта "Технопарк Mail.ru Group" при МГТУ им.Баумана. КРАТКОЕ СОДЕРЖАНИЕ: Лекция посвящена индексам и производительности. А так же: протоколированию запросов, плану запросов EXPLAIN, стратегиям запросов и JOINS. Хронометраж: 00:00:04 О теме лекции 00:00:47 Индексирование. Введение в индексы БД 00:01:55 Варианты индексов. btree - сбалансированное дерево 00:03:56 Индексирование btree (особенности) 00:06:27 hash-индексы 00:08:29 Индексирование hash (особенности). Коллизии hash-индексов 00:11:12 Некоторые типы данных с которыми ни btree, ни hash не работают 00:12:17 Индексирование GiST (R-Tree) 00:13:36 Индексирование GIN (инвертированный) 00:14:39 Индексирование: битовый индекс 00:17:20 Частичный индекс 00:20:35 Функциональный индекс 00:22:19 Кластерный индекс 00:25:45 Покрывающий индекс 00:28:35 Индексирование. "Расплата" 00:30:34 Как создается индекс? 00:32:59 Индексирование. Итог ("подытоживание") 00:35:25 Вопрос из зала по hash-индексам 00:38:07 Большой выигрыш при использовании покрывающих индексов 00:38:44 Ответы на вопросы по индексированию 00:48:30 Тестовая БД для рассмотрения работы индексов 00:54:08 Как выполняется простой запрос? (Тестовая БД) 00:59:44 Как выполняется запрос? (Два условия и два индекса) 01:07:00 Как выполняется запрос? (Сортировка и индексы) 01:09:59 JOIN-стратегии 01:17:10 Профилирование 01:19:16 Несколько вариантов поиска запросов, которые создают основную нагрузку на сервер 01:19:23 Вариант 1 - Статистика запросов 01:22:44 Вариант 2 - Протоколирование запросов 01:25:50 Логирование в CSV 01:27:15 Протоколирование запросов (нюансы) 01:28:41 На что важно обратить внимание при чтении отчетов 01:32:03 EXPLAIN 01:36:08 Параметр ANALYZE (важная ремарка) 01:36:37 EXPLAIN: Некоторые особенности работы 01:37:57 EXPLAIN: Начало 01:39:09 Что такое стоимость? О единицах времени 01:40:37 EXPLAIN: Статистика 01:42:20 EXPLAIN: ANALYZE 01:45:17 EXPLAIN: WHERE 01:48:46 EXPLAIN: TEXT 01:56:52 EXPLAIN: ORDER BY 02:00:40 EXPLAIN: JOIN 02:05:34 EXPLAIN: На что обратить внимание? 02:07:20 EXPLAIN: Разбор примера из тестовой БД 02:08:06 EXPLAIN: Графическое представление 02:09:32 EXPLAIN: Текстовое представление 02:10:31 EXPLAIN: Добавляем индексы 02:21:03 Чем плохи подзапросы? 02:29:02 По поводу производительности 02:36:45 Покрывающий индекс (Продолжение разбора примера из тестовой БД) ------------------------ О КАНАЛЕ: Официальный канал образовательных проектов Mail.Ru Group ► Нажмите здесь для подписки ‣ http://www.youtube.com/TPMGTU?sub_confirmation=1 Актуальные лекции и мастер-классы о программировании от лучших IT-специалистов. Если вы увлечены мобильной и веб-разработкой, присоединяйтесь! Наши проекты: Технопарк при МГТУ им. Баумана ‣ https://park.mail.ru Техносфера при МГУ им. Ломоносова ‣ https://sphere.mail.ru Технотрек при МФТИ ‣ https://track.mail.ru Техноатом при МИФИ - https://atom.mail.ru Технополис при СПбПУ - https://polis.mail.ru ------------------------ МЫ В СЕТИ: Технопарк в ВК | http://vk.com/tpmailru Техносфера в ВК | https://vk.com/tsmailru Технотрек в ВК | https://vk.com/trackmailru Техноатом в ВК | https://vk.com/technoatom Технополис в ОК: https://www.ok.ru/technopolis Технополис в ВК: https://vk.com/technopolis_ok Блог на Хабре | http://habrahabr.ru/company/mailru
Introduction to Join, Types of Join in DBMS in English, Hindi
 
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Introduction to Join, Types of Join in DBMS in English, Hindi for students of IP University Delhi and Other Universities, Engineering, MCA, BCA, B.Sc, M.Sc Colleges.
Views: 101386 Easy Engineering Classes
Does SQL table join order matter?
 
14:10
Have you ever wondered if the order of the tables in your FROM clause matter? In today's video, we look at why theoretically table join order *does* make a difference for performance and why SQL Server doesn't use the order you provide. We also look at different techniques for forcing SQL Server to use the join order you specified. Blog post with all demo code and links: https://bertwagner.com/2017/11/21/does-the-join-order-of-my-tables-matter/ Presentation by Adam Machanic on row goals: https://sqlbits.com/Sessions/Event14/Query_Tuning_Mastery_Clash_of_the_Row_Goals Music by Joakim Karud http://youtube.com/joakimkarud Follow me on Twitter: https://twitter.com/bertwagner Want to receive my latest weekly blog posts and videos in your inbox? Sign up for the newsletter here: https://upscri.be/c77fc8/
Views: 1433 Bert Wagner

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