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Search results “Oracle explain query plan”
Oracle SQL Tuning - How to Read Execution Plans (Explain Plan)
 
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In this free tutorial you will learn how to generate and read (interpret) an execution plan in Oracle Databases. See more FREE Oracle Tuning tutorials at http://skillbuilders.com/free-oracle-tutorials. Understanding what the Oracle Database does with your SQL is essential to tuning - and the execution plan is the key. Oracle Certified Master DBA John Watson will provide a brief introduction (4 minutes) - which includes John's tuning methodology, then demonstrate EXPLAIN PLAN, SQL*Plus AUTOTRACE and DBMS_XPLAN.DISPLAY_CURSOR. In the tutorial, John will teach you: - How to read an execution plan - Find the 1st step in the plan - Decipher the order of the steps in the plan - That EXPLAIN PLAN can be very misleading Prerequisites: To get the most from this tutorial, you should: 1 Know how to code SQL 2 Be familiar with SQL*Plus 3 Know - in very general terms - what an execution plan is. 4 Have a basic understanding of the Library Cache (this is where Oracle Database stores parsed SQL statements) 5 Have a basic understanding of the Cost Based Optimizer (this is the part of the database that parses your SQL, creates an execution plan. Hopefully the correct - most efficient - plan).
Views: 69334 SkillBuilders
Oracle Performance Tuning - Read and interpret Explain Plan
 
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Connect with me or follow me at https://www.linkedin.com/in/durga0gadiraju https://www.facebook.com/itversity https://github.com/dgadiraju https://www.youtube.com/c/TechnologyMentor https://twitter.com/itversity
Views: 47053 itversity
Oracle SQL Tutorial : Using execution plan to optimize query in oracle
 
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Oracle SQL Tutorial Oracle tutorial: Explain plan for query optimization in Oracle PLSQL Performance tuning explain plan in oracle performance tuning in oracle oracle tutorial for beginners explain plan in oracle 11g using execution plan to optimize query sql query analyzer sql query cost analysis https://techquerypond.wordpress.com This oracle tutorial show you how to use EXPLAIN PLAN in oracle. This video covers how to check cost of the query from DBMS_XPLAN.DISPLAY . You can find the cost of the query using the Using EXPLAIN PLAN FOR and based on the result you can optimize the query for faster performance. Subscribe on youtube: https://www.youtube.com/channel/UCpiyAesWNYOXSz5GPq8lbkA For more tutorial please visit #techquerypond https://twitter.com/techquerypond
Views: 17510 Tech Query Pond
Explaining the Explain Plan: Interpreting Execution Plans for SQL Statements
 
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Presenter: Maria Colgan, Oracle Corporation The execution plan for a SQL statement can often seem complicated and hard to understand. Determining if the execution plan you are looking at is the best plan you could get or attempting to improve a poorly performing execution plan can be a daunting task, even for the most experienced DBA or developer. This session examines the different aspects of an execution plan, from selectivity to parallel execution, and explains what information you should be gleaming from the plan and how it affects the execution. It offers insight into what caused the Optimizer to make the decision it did as well as a set of corrective measures that can be used to improve each aspect of the plan.
Views: 7312 ODTUG
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: 104740 radhikaravikumar
Oracle Explain Plan basics
 
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This video gives basic understanding of Oracle Explain plan and will help to understand execution plan terminology.
Views: 17239 amit wadbude
Interpreting Oracle Explain Plan Output - John Mullins
 
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Themis Instructor John Mullins presents some details on interpreting Oracle Database Explain Plan output. For more information visit http://www.themisinc.com
Views: 51518 Themis Education
12c SQL Performance Features Adaptive Execution Plans
 
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See Oracle Database change a SQL execution plan - during execution!! See more free 12c features lessons at http://www.skillbuilders.com/free-12c-performance-features-training-2.
Views: 290 SkillBuilders
05 04 Reading an Execution Plan
 
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ORACLE
Views: 753 oracle ocm
Query Tuning 101: How to Compare Execution Plans
 
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When you're tuning SQL query there's two important questions to keep in mind: * Have my changes made any difference? * If they have, is performance better or worse? In this video we'll look at how you can use SQL Developer to compare execution plans. This will enable you to differences between them and determine which plan performs better. ============================ 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: 16320 The Magic of SQL
Slow SQL Query? Get the Plan in Oracle SQL Developer!
 
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See how to get execution and explain plans, format and views those plans, use AutoTrace, and Real Time SQL Monitoring for your SQL queries in Oracle SQL Developer.
Views: 4916 Jeff Smith
Oracle Database 12c: Adaptive Execution Plans with Tom Kyte
 
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Tom Kyte introduces adaptive execution plans followed by a demo. "Adaptive Plans" in SQL Tuning Guide" http://www.oracle.com/pls/topic/lookup?ctx=db121&id=TGSQL221 "Controlling Adaptive Optimization" http://www.oracle.com/pls/topic/lookup?ctx=db121&id=TGSQL257 "Generating and Displaying SQL Execution Plans" http://www.oracle.com/pls/topic/lookup?ctx=db121&id=TGSQL271 "Keeping Your Database Secure" http://www.oracle.com/pls/topic/lookup?ctx=db121&id=DBSEG009
Views: 14616 OracleDBVision
SQL Server Query Plan Analysis: The 5 Culprits That Cause 95% of Your Performance Headache
 
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Ever open a huge query plan to track down a performance issue and instead find yourself overwhelmed by the sheer number of objects on the screen? How do you figure out which part of the plan.
Views: 12966 Fidela Aretha
ORACLE EXPLAIN PLAN FUNDAMENTALS
 
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This Tutorial will explain basics of Oracle 11g EXPLAIN Plan by using this ppt & some hands-on in Oracle 11g R2 Database.This tutorial will include below topics. Understanding EXPLAIN plan. Set up & Use EXPLAIN Plan. Explain PLAN_TABLE & related scripts & DBMS_XPLAN.DISPLAY. Generate & View EXPLAIN Plan. Read & Interpret basics of EXPLAIN Plan. EXPLAIN PLAN limitations.
Views: 165731 Anindya Das
22 Basic Execution Plans
 
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SQL Server 2012 Administration Essentials SQL Server 2014
The Basics of Execution Plans and SHOWPLAN in SQL Server
 
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This video is part of LearnItFirst's Transact-SQL Programming: SQL Server 2008/R2 course. More information on this video and course is available here: http://www.learnitfirst.com/Course161 Many of the ideas in this video will be revisited in chapters 5 and 11, so expect mostly basics here - details will come in later videos. Using the query from the last video, trainer Scott Whigham discusses execution plans. How can you uncover the steps SQL Server went through to arrive at the results? What is SHOWPLAN? Highlights from this video: - What does the execution plan tell us? - How can you look at the execution plan? - Estimated Execution Plan vs. Actual Execution Plan - How does SQL Server choose indexes? - Analyzing and understanding graphical execution plans - Determining costs of the components of execution - Using SHOWPLAN and much more...
Views: 89364 LearnItFirst.com
Using DBMS_XPLAN.DISPLAY_CURSOR to examine execution plans
 
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In this video I describe how you can use Oracle's DBMS_XPLAN.DISPLAY_CURSOR to examine the execution plan for a SQL statement that has recently been executed and determine if that plan is optimal or not and where you might be able to optimize it.
Views: 12098 Maria Colgan
Ways of generating EXECUTION PLAN in Oracle Database
 
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Learn how to generate execution plan in oracle database in many ways
Views: 3852 OrSkl Academy
Index and Execution Plan basics
 
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More at: https://dallasdbas.com/blog Index tuning and Execution Plan basics for Developers and New DBAs
Views: 655 Kevin Hill
Understanding The Execution Plan - Part 1
 
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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: 6916 Satish Lodam
Calculate query performance with Explain Plan in Oracle PLSQL.
 
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Explain plan is a wonderful utility in Oracle PL SQL. It helps you to understand how much cost a query takes to perform based on indexed table or table without index. In this oracle tutorial a full description is given on a table containing huge number of rows first based on index on a column and then without index.
Views: 3914 Subhroneel Ganguly
Obtaining Execution Plan in Oracle
 
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Obtaining Execution Plan in Oracle with demostration.
Views: 379 Expert-Oracle.com
Oracle 12c SQL Tuning - Adaptive Execution Plans
 
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Learn an Oracle Database 12c new performance feature - Adaptive SQL Plans. During execution, Oracle Database can switch the SQL to a new plan. A very powerful corrective measure! But if you don't know about it , how can you possibly tune SQL in Oracle Database 12c? Time to learn 12c!
Views: 5741 SkillBuilders
SQL Server Execution Plan Operators
 
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Table scans, clustered index scans, merge joins, sorts, and more.
Views: 36989 Brent Ozar Unlimited
Oracle SQL Tuning - How to Read Execution Plan Part 1
 
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Learn how to tune SQL. If you're going to tune Oracle SQL statements, you will need to learn how to read an execution plan! See all Free lessons in this tutorial at http://www.skillbuilders.com/sql-tuning-for-beginners-free-tutorial .
Views: 2629 SkillBuilders
Query Tuning 101: Access vs. Filter Predicates In Execution Plans
 
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Have you ever wondered what the difference is between the "filter predicates" or "access predicates" steps listed in execution plans - or even what a predicate is? If so, watch this video to find out! 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: 5503 The Magic of SQL
Why Did Your SQL Execution Plan Change? | Alfredo Krieg
 
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Oracle ACE Alfredo Krieg offers advice on tools for improving database performance in this 2 Minute Tech Tip recorded at the 2016 Great Lakes Oracle Conference in Cleveland, OH.
Views: 351 ArchBeat Archive
Oracle Explain Plan
 
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Oracle SQL Executions: Explain Plan and Execution Plan A simple introduction with a single table example
Views: 1144 Hemant K Chitale
Oracle Parallel Execution Plans Deep Dive
 
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A presentation about understanding the essentials of Oracle Parallel Execution and how to read the corresponding execution plans
Views: 3480 Randolf Geist
sql query optimization by using SQL server query execution plan
 
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SQL server query execution plan- sql query optimization by using SQL server query execution plan
Oracle SQL Tuning - Oracle Execution Plans for Beginners
 
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how to generate explain plan in oracle | Oracle Shooter
 
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#oracleshooter #Explainplan Full Blogs Link :- https://oracleshooter.blogspot.com/2019/04/explain-plan-in-oracle.html Contact Info :- Instagram:- https://www.instagram.com/oracleshooter Facebook :- https://www.facebook.com/oracleshooter Twitter :- https://twitter.com/oracleshooter Blogger :- https://oracleshooter.blogspot.com/ Email Id :- [email protected]
Views: 142 Oracle Shooter
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: 15438 SkillBuilders
Part 1 Execution Plans in SQL Server
 
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Video talks about Execution Plans in SQL Server show Execution Plans in SQL Server sql execution sql show plan Step by step SQL Training videos SQL Tutorial
Views: 7441 Training2SQL MSBI
Oracle Performance Tuning - Generate Explain Plan
 
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Connect with me or follow me at https://www.linkedin.com/in/durga0gadiraju https://www.facebook.com/itversity https://github.com/dgadiraju https://www.youtube.com/c/TechnologyMentor https://twitter.com/itversity
Views: 9167 itversity
Oracle SQL Performance Tuning for Developers: Understand Explain Plans
 
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Understanding Explain Plans is an excerpt from Oracle SQL Performance Tuning for Developers: http://www.informit.com/store/oracle-sql-performance-tuning-for-developers-livelessons-9780134117027 6+ Hours of Video Instruction The focus of Oracle SQL Performance Tuning for Developers LiveLessons is to illustrate coding techniques that ensure a consistent response time between instances and releases of the Oracle database. This course works closely with performance tuning of actual SQL statements. Description In this video training, Dan Hotka starts out with a complete overview of the Oracle architecture so students can get an understanding how their SQL and applications can take advantage of the computing environment. This course then goes in-depth on understanding and controlling the Explain Plan, which is how and in what order Oracle retrieves data. The discussion includes considerable detail, with SQL examples, on how the optimizers--both rule-based and cost-based, but mostly cost-based--make their decisions. Students will work with a variety of SQL statements, reviewing Explain Plans and making changes to make these SQL statements perform better. Lectures include index design, using hints and coding style to control the Explain Plans, and how to use useful tools such as index monitoring, SQL Trace, and the PL/SQL profiler. This LiveLessons course takes a close look at indexes: how Oracle selects them, why they are sometimes not used, and how to tell if indexes are being used. This course includes Oracle10g, Oracle11g, and Oracle12c SQL tuning topics. Skill Level Intermediate Learn How To Read and understand Explain Plan content Review an Explain Plan and tell quickly if this is a good plan Understand a good index column candidate from a not-so-good candidate Quickly tell the likelihood if your SQL will use an existing index Use coding and a variety of Hints (directives) that can produce better performing SQL Execute and interpret SQL trace output Who Should Take This Course Oracle programmers Oracle database administrators who need additional training on SQL tuning Course Requirements Working knowledge of the SQL query language http://www.informit.com/store/oracle-sql-performance-tuning-for-developers-livelessons-9780134117027
Views: 3601 LiveLessons
Estimated rows vs actual rows oracle  12c(Explain Plan)
 
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what is "rows" in explain plan? Discusses, SQL execution plan A-ROWS vs. E-ROWS concept. Excerpt from "Oracle SQL Tuning Video Tutorial". dbvidya offers oracle sql tuning online training. www.dbvidya.com [email protected] +91 9912323000 Oracle SQL Tuning Video Tutorial https://dbvidya.talentlms.com/catalog/info/id:125 Oracle DBA Performance Tuning https://dbvidya.talentlms.com/catalog/info/id:128 Dimensional Modeling Video Tutorial https://dbvidya.talentlms.com/catalog/info/id:131 Erwin Tool Training Video Tutorial https://dbvidya.talentlms.com/catalog/info/id:130 Oracle Performance Tuning Online Training : http://www.dbvidya.com/course/perform... Oracle SQL Performance Tuning Training Online : http://www.dbvidya.com/course/sql-tun... Oracle Performance Tuning Videos Tutorial for DBA and Developers : http://www.dbvidya.com/oracle-perform... Oracle AWR Tutorial: http://www.dbvidya.com/course/oracle-... Erwin Tool Online Training : http://www.dbvidya.com/course/erwin-t... ER Data Modeling Course : http://www.dbvidya.com/course/er-mode... Dimensional Modeling Training Online : http://www.dbvidya.com/course/dimensi... Oracle Database Blogs : http://www.dbvidya.com/blog/
Views: 106 DbVidya
Access vs. Filter in SQL Execution Plans | Chris Saxon
 
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Chris Saxon, an SQL Developer Advocate with Oracle, takes to his kitchen to explain the differences between access and filter in an SQL execution plan.
Views: 725 ArchBeat Archive
Influencing Oracle SQL Execution Plans
 
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Themis instructor John Mullins discusses Oracle SQL Execution plans and how you can influence them for better SQL performance.
Views: 2179 Themis Education
Oracle SQL Tuning Re-Optimizing Execution Plans with Cardinality Feedback
 
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Cardinality feedback, introduced with Oracle Database 11g, has been significantly enhanced with 12c. Cardinality feedback allows the CBO to learn from a cardinality estimate mistake and re-optimize the execution plan. Learn more in this free SQL Tuning tutorial. See all free Oracle Database tutorials at http://www.skillbuilders.com/free-oracle-tutorials.
Views: 3281 SkillBuilders
How Do I Analyze a SQL Server Execution Plan? (Dear SQL DBA Episode 50)
 
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Prefer a written transcript? Go to https://littlekendra.com/2017/09/22/how-do-i-analyze-a-sql-server-execution-plan/ A query is slow, and you figure out how to collect the query execution plan. Now what? In this episode I talk "big picture" about what execution plans are, what "cost" is, why to collect "compiled for" values, and the steps I take to analyze execution plans while performance tuning queries.
New SQL ID Does not mean hard parsing or new execution plan
 
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Not that new SQL ID lets oracle database generate a new execution plan
Views: 1703 OrSkl Academy
Execution Plan Example 1
 
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Get the complete course on SQL Tuning(Regular price $199) for only $10 https://www.udemy.com/sql-tuning/?couponCode=UDEYOU
Views: 931 Oracle Training
Execution Plan Example 4
 
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Get the complete course on SQL Tuning(Regular price $199) for only $10 https://www.udemy.com/sql-tuning/?couponCode=UDEYOU
Views: 2504 Oracle Training
SQL Tuning for Beginners 8 How to Read Execution Plan Part 2
 
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Learn how to tune Oracle SQL statements! You'll need to know how to read an execution plan. See all FREE lessons http://www.skillbuilders.com/sql-tuning-for-beginners-free-tutorial
Views: 964 SkillBuilders
SQL Server Execution Plan Basics
 
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Follow up to this video: https://youtu.be/52DZK_lPB8E This channel is dedicated to New and Accidental SQL Server DBAs! http://www.DallasDBAs.com/blog for more stuff
Views: 1258 Kevin Hill
Oracle 11g Hints Overview
 
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In this Video tutorial we will discuss about Optimizer hints in Oracle. What is optimizer hint, when & why its needed. Different Category of hints. Description of mostly used hints. Demonstrate how query plan can change with the influence of hint.
Views: 55127 Anindya Das
Understanding SQL Trace, TKPROF and Execution Plan for Beginners
 
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Presenter: Carlos Sierra, Oracle Corporation In this session, participants will learn about producing a SQL Trace then a summary TKPROF report. A sample TKPROF is navigated with the audience, where the trivial and the not so trivial is exposed and explained. Execution Plans are also navigated and explained, so participants can later untangle complex execution plans and start diagnosing SQL performing badly.
Views: 1005 ODTUG