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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: 9493 TechLake
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!
Sort Merge Join on SQL
 
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Sort Merge Join on SQL
Views: 162 TUTOR SC
The Importance of Nested Loops Joins in SQL
 
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Nested Loops Joins are one of the primary physical join operators used by SQL Server. In today's episode we discuss how Nested Loops Joins work, as well as how to use that knowledge to troubleshoot a slow performing query's execution plan. Subscribe and turn on notifications to never miss a weekly video: https://www.youtube.com/c/bertwagner?sub_confirmation=1 Related blog post with code snippets: https://bertwagner.com/2018/12/11/visualizing-nested-loops-joins-and-understanding-their-implications/ Be sure to check out part 2 on merge joins: https://youtu.be/IFUB8iw46RI And part 3 on hash match joins: https://youtu.be/59C8c7p_hII Additional excellent blog posts that go further in-depth: https://blogs.msdn.microsoft.com/craigfr/2006/07/26/nested-loops-join/ https://sqlserverfast.com/epr/nested-loops/ Follow me on Twitter: https://twitter.com/bertwagner
Views: 1082 Bert Wagner
Merge Join Internals in SQL Server
 
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Without additional optimizations, SQL Server's Merge Join algorithm is the fastest physical join operator available. In this episode we dive into the internals to understand how the merge join algorithm works, as well as what it means for our query performance. Subscribe and turn on notifications to never miss a weekly video: https://www.youtube.com/c/bertwagner?sub_confirmation=1 Related blog post about Merge Joins: https://bertwagner.com/2018/12/18/visualizing-merge-join-internals-and-understanding-their-implications/ Be sure to check out part 1 on nested loops joins: https://youtu.be/0arjvMJihJo And part 3 on hash match joins: https://youtu.be/59C8c7p_hII The pessimistic costing of merge joins: https://dba.stackexchange.com/questions/165974/how-to-force-a-merge-join-without-a-hint/166054#166054 Going further in-depth with merge joins: https://sqlserverfast.com/epr/merge-join/ Follow me on Twitter: https://twitter.com/bertwagner
Views: 975 Bert Wagner
Oracle Hints Tutorial for improving performance with examples
 
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Oracle Hints Tutorial for improving performance with examples Oracle Hints Oracle Tutorial for beginners SQL Tutorial for beginners SQL Hints SQL Performance tuning
Views: 4372 TechLake
Hash Join
 
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#Oracle #HashJoin How a Hash Join is executed
Views: 2199 Hemant K Chitale
Oracle SQL MERGE Statement
 
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https://www.databasestar.com/oracle-merge-sql/ In this video, we’ll learn what the Oracle MERGE statement does and how you can use it. What is the MERGE statement? It’s a statement that lets you either insert or update data in a table - all in a single statement! It’s helpful if you’re using an ETL (Extract Transform Load) process when creating or updating a data warehouse. It’s also helpful when loading data into your own database if you’re not creating a data warehouse. It allows you to prevent duplicate data and ensure you have up-to-date data in your table. The syntax looks like this: MERGE INTO table_name USING table_name ON (condition) WHEN MATCHED THEN update_clause DELETE where_clause WHEN NOT MATCHED THEN insert_clause [LOG ERRORS log_errors_clause reject_limit integer | unlimited ] In this video, I also show an Oracle SQL MERGE statement example, so watch the video to find out more. For more information on the MERGE statement and how you can use it in your queries, read the related article here: https://www.databasestar.com/oracle-merge-sql/
Views: 1232 Database Star
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: 539 Oracle Developers
Merge Statement
 
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Views: 513 Saif Shaikh
LEFT and RIGHT OUTER join - Traditional join method | Oracle SQL fundamentals
 
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Enroll into full course with free cloud access for 30 days: https://dbagenesis.com/p/oracle-sql-fundamentals/
Views: 24 DBA Genesis
Oracle Hints explained
 
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Oracle Hints
Views: 583 FAKE News
Performance tuning tip 1  -  Remove Corelated subquery
 
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Best explanation how to remove correlated sub query.Please watch complete video for more detail.
Views: 1144 SqlIsEasy
SQL Advanced Videos #5: Hash Join
 
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The last of the three physical join operator and by far the most interesting one. However we pay a price in terms of memory for that interesting join :) #sql #database #hashjoin #hash #join
Views: 3551 SQL TV
SQL: The MERGE Statement
 
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This video gives a quick overview of the MERGE statement in SQL. For more information see: https://oracle-base.com/articles/9i/merge-statement https://oracle-base.com/articles/10g/merge-enhancements-10g Website: https://oracle-base.com Blog: https://oracle-base.com/blog Twitter: https://twitter.com/oraclebase Cameo by Cary Millsap : Blog : http://carymillsap.blogspot.co.uk/ Twitter : https://twitter.com/CaryMillsap Cameo appearances are for fun, not an endorsement of the content of this video. All trademarks, product names and logos are the property of their respective owners.
Views: 9299 ORACLE-BASE.com
Nested Loop Join in SQL Server by Satya Ramesh
 
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In this video, you will learn about basics around Nested Loop join and how Nested Loop Join algorithm works. You will also learn about different scenarios where SQL Server decides to use Nested Loop Join operator and how it affects performance. Video resources including presentation, demo files, code snippets and more learning material is available on http://www.dataplatformgeeks.com/ (Join for free and access all the resources) Connect with The Speaker (Satya Ramesh) -Follow on Twitter: https://twitter.com/satyaramesh230 -Follow on FaceBook at https://www.facebook.com/satyaramesh230 -Follow on LinkedIN: https://www.linkedin.com/in/ramesh-sa... Connect with SQLMaestros: http://sqlmaestros.com/ -http://www.twitter.com/SQLMaestros -https://www.facebook.com/SQLMaestros -Email us: [email protected] Have technical questions? Join the largest SQL group on FB www.facebook.com/groups/theSQLGeeks Our LinkedIn group https://www.linkedin.com/groups/6753546 DataPlatformGeeks (DPG) Community Join the fastest growing community of data & analytics professionals Why Join DPG? http://www.dataplatformgeeks.com/ -Attend all events hosted by DPG, including SQLMaestros Special Events -Get access to free videos, labs, magazines and host of learning resources -Download all events & conference material -Learn new skills. Sharpen existing skills -Be part of Asia’s Largest Data/Analytics Community -Opportunity to be a regional mentor & speaker at our events -Immense technical & professional development Do you know about Data Platform Summit? http://www.DPS10.com
Views: 1591 SQLMaestros
Nested Loop Join on SQL
 
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Nested Loop Join on SQl
Views: 142 TUTOR SC
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: 27591 StudyYaar.com
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: 695 Franck Pachot
Oracle Hints - FIRST_ROWS - Example
 
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Excerpt from "Oracle sql tuning-advanced" video tutorial training. www.dbvidya.com/course/sql-tuning-advanced/ [email protected] +91 991 2323 000 Oracle Performance Tuning Online Training : http://www.dbvidya.com/course/performance-tuning-for-dba/ Oracle SQL Performance Tuning Training Online : http://www.dbvidya.com/course/sql-tuning-advanced/ Oracle Performance Tuning Videos Tutorial for DBA and Developers : http://www.dbvidya.com/oracle-performance-tuning-videos/ Oracle AWR Tutorial: http://www.dbvidya.com/course/oracle-awr/ Erwin Tool Online Training : http://www.dbvidya.com/course/erwin-tool/ ER Data Modeling Course : http://www.dbvidya.com/course/er-modeling/ Dimensional Modeling Training Online : http://www.dbvidya.com/course/dimensional-modeling/ Oracle Database Blogs : http://www.dbvidya.com/blog/
Views: 271 DbVidya
Optimize Code with Merge Statement in Oracle PLSQL.
 
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Merge Statement in PLSQL not only optimize you code, it also make you code looks good and readable, save you from using a long and redundant code like using cursor loop, plsql collection object, all done with a few line of statement.
Views: 1146 Subhroneel Ganguly
Learn Oracle | How to use the Merge Statement 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: 1874 Pebbles Tutorials
Hash Join on SQL
 
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Hash Join on SQL
Views: 265 TUTOR SC
Hints and Tips - A silent movie on joins
 
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The vision says it all ... a basic primer on how joins are performed in Oracle, using the metaphor of playing cards. Enjoy... ========================================­============== 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: 2076 Connor McDonald
MSSQL MERGE STATEMENT | UPDATE + INSERT = UPSERT
 
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Views: 245 Viral Videos
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: 1115 SQL TV
11g Nested Loop
 
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#Oracle #NestedLoop 11g Enhancement
Views: 902 Hemant K Chitale
Oracle Database - Wait Event - Sequential Read Vs Scattered Read
 
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In this video you will learn about what is Sequential read and how is it different from Scattered read in an Oracle Database. The entire course can be purchased at https://www.udemy.com/oracle-database-troubleshooting-and-tuning Use Coupon Code - YOUTUBETT Our Upcoming Online Course Schedule is available in the url below https://docs.google.com/spreadsheets/d/1qKpKf32Zn_SSvbeDblv2UCjvtHIS1ad2_VXHh2m08yY/edit#gid=0 Reach us at [email protected]
Views: 1907 Ramkumar Swaminathan
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: 13151 SQLpassion
05 04 Reading an Execution Plan
 
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ORACLE
Views: 608 oracle ocm
Parallel Execution In an Oracle RAC environment
 
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In an Oracle RAC environment, a SQL statement executed in parallel can run across all of the nodes in the cluster. For more information please visit https://www.koenig-solutions.com/oracle-database-12c-rac-administration-training.aspx
Views: 53 Koenig Solutions
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:
Four Steps to Oracle SQL Tuning  - A Methodolgy
 
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Learn a predictable and repeatable methodology for tuning Oracle SQL statements. Just four steps that you should always follow when tuning an SQL statement. (Note this video does not contain examples of how to apply the four steps, just what the steps are.) Oracle Certified Master John Watson presents. John concludes with a brief overview of how SkillBuilders SQL tuning course provides the information you need to apply the four steps. Learn more about SkillBuilders SQL Tuning course http://skillbuilders.com/oracle-sql-tuning-training 1. What is Oracle doing? (explain plan, trace) 2. Why is Oracle doing it that way? (analyze the execution plan) 3. Is there a better way? Test! 4. If there's a better way, push the CBO towards the better way.
Views: 14172 SkillBuilders
Hash Join
 
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Views: 10958 mrjazzs
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
Reading Oracle SQL Execution Plans - Practice Makes Perfect
 
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To tune a SQL statement, you need to understand the execution plan. Can you identify the 1st step in an execution plan? The 2nd? The 3rd? In this short tutorial, Oracle Certified Master DBA John Watson of SkillBuilders uses a MERGE JOIN to help you understand how to find the order of execution, essential for SQL tuning.
Views: 1256 SkillBuilders
Oracle Database Hints Tuning Tips Presentation Video Oracle DB
 
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For a quick reference on oracle visit http://PocketORACLE.blogspot.com
Views: 5070 TheEzguide
Access Paths
 
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Access Paths watch more videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Parth Panjab, Tutorials Point India Private Limited
SQL Tuning How to Tune Joins - Lesson 1
 
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How do you tune SQL Joins? Start with the most important ingredient - the join order! In this free tutorial by Oracle Certified Master DBA John Watson of SkillBuilders.com you will learn what is the best join order and how to get the optimal join order. Watch all Lessons, FREE, at http://skillbuilders.com/tuning-joins-optimal-join-order.
Views: 3465 SkillBuilders
[Oracle SQL Performance Tuning: 3/4] Understanding Explain Plans
 
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This presentation explains how to read explain plans. The series of SQL tuning videos presents performance tuning tips for developers. For presentation used in this video, please visit: https://drive.google.com/drive/folders/0B6EDqGZwjejmWng5VWM3ZEtaNzA?usp=sharing
Views: 6641 anilkumar ghorakavi
Oracle 12C New Feature Listagg function improvements
 
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oracle 12c new features Queries used in the video are given in the blog link http://easy-learning-tech.blogspot.in/2018/04/oracle-12c-new-feature-listagg-function.html oracle 12c new features for developers
Views: 1335 Siva Academy
SQL Server Execution Plan Query Hints
 
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SQL Server Execution Plan Query Hints
Views: 774 Geek Tamizhan
Oracle Database 11g New Features: Performance Tuning with Feedback Based Optimization
 
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Oracle Database 11g provides a new feature called "feedback based optimization". In this tutorial you will learn what feedback-based optimization is and how it helps Oracle Database 11g performance. One part of nine tutorials dedicated to Oracle 11g Adaptive Cursor Sharing. View all 10 videos for free at SkillBuilders.com/ACS.
Views: 4746 SkillBuilders
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: 1231 TechLake
Understanding The Execution Plan - Part 1
 
01:29:06
Topic: Understanding The Execution Plan In this video (part-1) I have explained - The basics of Oracle Execution Plan - How an Execution Plan Looks from SQL Developer, SQL*Plus - How to use Oracle Explain Plan command - Where else one can find Oracle's Execution Plan apart from PLAN_TABLE - Some Examples of Execution Plan - Using DBMS_XPLAN package to format the output while printing the Execution Plan
Views: 6676 Satish Lodam
Why Has an Index Broken My Query?
 
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Sometimes Oracle can give unexpected exceptions. This often happens when working with dates stored as strings. In this video, Chris investigates why adding an index to a varchar storing dates could cause a query to fail. He explains why this happens. Then he shows workaround to avoid this. You can download the scripts in this video from LiveSQL at: https://livesql.oracle.com/apex/livesql/file/content_CVN82PZQWQSUFYMOVKG0VI19T.html ============================ 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: 3000 The Magic of SQL
Hint DRIVING_SITE para otimizar SQL distribuído
 
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Aprenda a otimizar SQL distribuído utilizando o hint DRIVING_SITE
Views: 253 Fabio Prado

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