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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: 5574 TechLake
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: 2753 Randolf Geist
Why Use Parallel Processing?
 
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This video compares the use of parallel and serial processing for the same SQL query. Copyright © 2012 Oracle and/or its affiliates. Oracle® is a registered trademark of Oracle and/or its affiliates. All rights reserved. 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 of merchantability, fitness for a particular purpose, and non-infringement.
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: 51315 Anindya Das
Global Index rebuild scenario in Oracle Database 11g
 
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Why and How we need to rebuild global Index in Oracle 11g
Views: 2901 Athar Fahad
Using Parallel GROUP BY
 
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This video shows you the behavior of the GROUP BY clause when run in serial and in parallel. Copyright © 2012 Oracle and/or its affiliates. Oracle® is a registered trademark of Oracle and/or its affiliates. All rights reserved. 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 of merchantability, fitness for a particular purpose, and non-infringement.
Oracle Performance - Indexes
 
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Oracle Performance - Indexes
Views: 263 The Silent DBA
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: 4610 Tech Coach
Sidecar Index - Solr Components for Parallel Index Management, Andrzej Bialecki, LucidWorks
 
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Sidecar Index - Solr Components for Parallel Index Management Presented by Andrzej Bialecki, LucidWorks This session presents a set of Solr components for easy management of "sidecar indexes" - indexes that extend the main index with additional stored and / or indexed fields. Conceptually this can be viewed as an extension of the ExternalFileField or as a static join between documents from two collections. This functionality is useful in applications that require very different update regimes for the two parts of the index (e.g. main catalogue items combined with clickthroughs).
How to Move Object from one Table Space to Another Table Space? | How to Rebuild the Index ?
 
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This Video will teach you How to Move Object one Table Space to Another | How to Rebuild the Index ? move table from one tablespace to another in oracle 11g oracle move schema to another tablespace oracle how to move objects to another tablespace oracle 11g move schema to another tablespace alter table move tablespace oracle 8i oracle move table script oracle move cluster to new tablespace oracle move table example rebuild index oracle script alter index rebuild online parallel oracle rebuild all indexes oracle index rebuild online vs offline oracle rebuild partitioned index index rebuild oracle best practice index rebuild script in oracle 11g
Views: 854 Oracle PL/SQL World
06 04 Index Lookup Operations
 
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ORACLE
Views: 37 oracle ocm
SQL: Introduction to Optimizer in Oracle
 
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In this tutorial, you'll know what is the meaning and use of Optimizer in Oracle
Views: 17355 radhikaravikumar
BITMAP  and  BITMAP JOIN INDEX IN ORACLE explained
 
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The video explains BITMAP and BITMAP JOIN INDEX IN ORACLE and when you should create them on a column. BITMAP INDEXES should be dealt with carefully as they can lead to serious performance issues if the table is updated by multiple processes in parallel. Indexing Basics :https://www.youtube.com/watch?v=0X9bbtwTnuE&t=1095s Star and snowflake Schema :https://www.youtube.com/watch?v=Qq4yhhAk9fc&t=17s
Views: 2969 Tech Coach
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: 2395 TechLake
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: 37425 itversity
SQL: Optimizer Hints Part-1
 
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In this tutorial, you'll learn...what are optimizer hints and how to use it.. SQL (pronounced "ess-que-el") stands for Structured Query Language. SQL is used to communicate with a database. According to ANSI (American National Standards Institute), it is the standard language for relational database management systems.
Views: 19421 radhikaravikumar
The Parallel - Oracle
 
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Off the album, "Weaver" FOLLOW ON SOCIALS http://facebook.com/TheParallel http://twitter.com/TheParallelCA http://instagram.com/theparallel LYRICS: Oracle Will I set sail again, I never thought that I would see the truth, Confusion, seclusion, I am left in an empty room, Build me up to crumble down again, Don’t let them in, A voice behind the door says, “Do not be afraid”. Do you trust your inhibitions to protect you along the way? Speak with honesty, no one's listening, Too much regret, Made its way into my head. And now I only see, what the worst of me believes, [Chorus] I am the constant, My past is the problem, Ridding myself of the excess, My core is exposed, Open up these wounds, Lost in my atrophy, I am divided by all that I am, And all, all that I wanted to be, God of dialect, have I overstepped the truth? What do I hold true? Each day a stupor, fade to the next, God of dialect,have I disappointed you? I trust the process, Too much regret made its way into my head, And now I only see what the worst of me believes, Will I forget, what directions I’ve been led? Or find my own inside? The notion that I won’t be swayed, I won’t be swayed, I won’t be.
Views: 583 invoguerecords
Oracle Optimization - Table Partitions
 
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Oracle optimization: create table partitions and Index-Organized Table. Other lessons, visit http://www.learn-with-video-tutorials.com/plsql-oracle-optimization
Why Won't Oracle Use My Index - 12c Attribute Clustering - Lesson 1
 
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Sometimes a poor clustering factor is the cause when Oracle Database cost based optimizer does not choose to use an index. With Oracle 12c (12.1.0.2 EE) offers a new feature that can really help - "Atrribute Clustering". This is implemented with a new keyword on CREATE TABLE - "CLUSTERING BY LINEAR ORDER". In this Free Tutorial from SkillBuilders and Oracle Certified Master DBA John Watson, you'll get a brief refresher on clustering factor and a demonstration of CREATE TABLE - "CLUSTERING BY LINEAR ORDER" - so the CBO will use your index! In this first lesson, John will provide a brief review of clustering factor. See all 6 lessons - FREE - at http://www.skillbuilders.com/12c-attribute-clustering
Views: 358 SkillBuilders
Using Partition Wise Join
 
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This video shows you the use of partition wise join in parallel processing. Copyright © 2012 Oracle and/or its affiliates. Oracle® is a registered trademark of Oracle and/or its affiliates. All rights reserved. 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 of merchantability, fitness for a particular purpose, and non-infringement.
eXtrem Parallel Processing for Oracle
 
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eXtrem Parallel Processing for Oracle
Views: 180 Petr Jezek
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: 2886 The Magic of SQL
Oracle SQL Tuning Expert Series - Understanding Indexes
 
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Ross Leishman of DWS Ltd presents the principles of Understanding Indexes for SQL Tuning. The presentation includes an entertaining demonstration of Indexes featuring DWS Alumnus Jordan Thomas as a "Buffer Cache". DWS Ltd is a leading publicly listed Australian IT Services company, providing services to blue chip organisations since 1991. With a business philosophy based upon integrity, reliability and professional service delivery, DWS provides end to end IT solutions. www.dws.com.au
Views: 43680 DWS Ltd
Range Partitioning in Oracle
 
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In this video I have explained what is range partitioning along with it's 2 real project use cases. I have also explained interval Partitioning as an extension of Range partitioning If you have not watched my Initial Videos on partitioning I will recommended watching them before watching this video Apologies for the 10 second video glitch between 6 and 7 minutes :(
Views: 3633 Tech Coach
Real-World Performance - 8 - Set Based Parallel Processing
 
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Check out the entire series on the Oracle Learning Library at http://www.oracle.com/goto/oll/rwp In this video, listen and watch Andrew Holdsworth, Vice President of Oracle Database Real-World Performance at Oracle Corporation, as he demonstrates how set based parallel processing affects performance. Copyright © 2014 Oracle and/or its affiliates. Oracle® is a registered trademark of Oracle and/or its affiliates. All rights reserved. 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 of merchantability, fitness for a particular purpose, and non-infringement.
Hints
 
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Hints watch more videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Parth Panjab, Tutorials Point India Private Limited
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: 21859 SQLProfiler.com
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: 7274 Oracle World
[Oracle SQL Performance Tuning: 4/4] Basic Hints and their Usage
 
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This presentation explains how to use basic hints of Oracle. The series of SQL tuning videos presents performance tuning tips for developers
Views: 10322 anilkumar ghorakavi
Using Parallel and Cardinal Hint
 
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This is a demo on using Parallel and Cardinal Hint to tune queries in ILM.
Views: 1277 Informatica Support
Using Hint Parallel
 
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Cơ sở dữ liệu nâng cao
Views: 257 h2a
Oracle Hints explained
 
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Oracle Hints
Views: 379 Telugu Blast News
DBMS - Sparse vs. Dense Index
 
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DBMS - Sparse vs. Dense Index Watch more Videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Arnab Chakraborty, Tutorials Point India Private Limited
DML Processing in an Oracle Database -  DBArch Video 8
 
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This video explains the steps involved in processing a DML statement in an Oracle Database Server. 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: 49576 Ramkumar Swaminathan
Performance Tuning CPU issues with indexes
 
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Jayanth @Enabled Business In this video we cover how to identify if there is a CPU issue and follow one of the many paths available to improve performance by using Indexes in SQL Server table. We cover how CPU issues are manifested using CXPACKETS wait type for parallelism and how using the right Non Clustered Indexes within the OLTP design we can improve not just the query execution times but also bring down th CPU issues as well. The target audience for this video is novice to intermediate DBAs and developers who are looking to learn a bit more about troubleshooting CPU issues in MS SQL Server.
Views: 781 Jayanth Kurup
Parallelism in SQL
 
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Parallelism in SQL watch more videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Parth Panjab, Tutorials Point India Private Limited
PL/SQL Collections
 
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Held on August 7 2018 Collections are PL/SQL's version of arrays and there are three types: associative arrays, nested tables, varrays. They are used in many performance features of PL/SQL, such as bulk processing, as well as table functions. Steven Feuerstein uses them all the time and thinks you should, too. He kicked off this Office Hours with some of his favorite collections features/usages, and then he and Chris Saxon answered questions on measuring PGA, executing DML in parallel, and more. 2:30 Steven's favorite collection things 3:20 First a little quiz! 7:56 Banish row-by-row SQL processing 14:06 String-indexed collections 17:19 Nested collections 20:42 Table functions 26:18 Q&A 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: 714 Oracle Developers
Oracle Performance Tuning - Loading Data - 05 Direct Path Load
 
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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: 1645 itversity
What is a Partition in Oracle and Type of Partitions , Range Partition
 
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What is Partition in Oracle and Type of Partitions Range Partition 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: 1599 TechLake
Oracle Star Transformation
 
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Oracle Star Transformation
Views: 197 The Silent DBA
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: 25918 StudyYaar.com
Oracle - Global is Local
 
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Views: 59 IFBTA
Efficient Function Calls From SQL (Part 5) : Pipelined Table Functions
 
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The fifth part of a mini-series of videos showing how you can improve the performance of function calls from SQL. In this episode, we compare the performance of conventions table functions with pipelined table functions. For more information see: https://oracle-base.com/articles/misc/pipelined-table-functions https://oracle-base.com/articles/misc/efficient-function-calls-from-sql Website: https://oracle-base.com Blog: https://oracle-base.com/blog Twitter: https://twitter.com/oraclebase Cameo by Mike Dietrich : Blog: https://blogs.oracle.com/UPGRADE Twitter: https://twitter.com/MikeDietrichDE Cameo appearances are for fun, not an endorsement of the content of this video.
Views: 11221 ORACLE-BASE.com
SQL Server 2008 Partitioned Table and Parallelism
 
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Detailed Article for "Partitioned Table and Parallelism" is available at : http://sqlserver-training.com/sql-server-2008-partitioned-table-parallelism-concept-video Follow us at more Updates at ----------------------------------------- Website : http://sqlserver-training.com/ Twitter : http://twitter.com/dbatag/ Facebook : http://facebook.com/dbatag/ Linked In : http://in.linkedin.com/in/dbatag/ ================================ SQL Server 2008 has removed the bottleneck of single-thread per partition over partitioned tables, which was found in SQL Server 2005. The previous bottleneck can cause performance problems under certain circumstances: On systems with many CPUs, if the table schema has less partitions than there are CPUs, then not all the CPUs will be used to process the query. Some examples: On a 32-way box, a query over a 12-partition table (e.g. a sales table partitioned by month) will only use 12 threads (one on each of 12 CPUs). This means 20 CPUs are potentially idle. On a 4-way box, a query over a 12-partition table only accesses a single partition so will only use one thread (on one CPU). This means 3 CPUs are potentially idle. On tables that have skewed data such that one partition is much larger than another, the length of time the query takes to complete will be bounded by the single thread processing the largest partition. As part of the set of improvements in SQL Server 2008 for data warehousing there will be an option to change the threading behavior for queries over partitioned tables. The new, alternative model is that all available threads process part of each partition and then move into the next partition. This allows all available CPUs to take part in processing the query, which should lead to a drop in the query completion time. The Following video shows, SQL Server 2008 -- Partitioned Table & Parallelism feature and shows graphically, how SQL Server 2008 has improved performance of Partitioned Tables. Visit the following link for more details and SQL Server Tutorials http://sqlserver-training.com/sql-server-2008-partitioned-table-parallelism-concept-video
Views: 17768 DBATAG
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: 3234 LiveLessons
Oracle SQL Tuning - Data Warehouse Star Transformations, Even with Standard Edition!
 
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Joining large tables in a Data Warehouse will often generate star transformations in the execution plan. So, what is a star transformation? And, what if you don't have Enterprise Edition - so you can't build Bitmap Indexes? In this free tutorial, Oracle Master John Watson will demonstrate star transformations in EE and how to make them work even without bitmap indexes - Standard Edition can save you thousands in licensing fees! This is Part 3 of a 5 Part series. View all video tutorials at SkillBuilders.com/EqualSQL.
Views: 4552 SkillBuilders
Oracle DB Vs MySQL for Enterprise DataBase Deployments
 
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Oracle DB is big, and expensive, but it brings a lot to the "table" when compared with MySQL. MySQL has limited ability to audit. MySQL's security is unsophisticated. There are no groups or roles, no ability to deny a privilege (you can only grant privileges). A user who logs in with the same username and password from different network addresses may be treated as a completely separate user. There is no built-in encryption comparable to Oracle. MySQL's Authentication is built-in. There is no LDAP, Active Directory, or other external authentication capability. MySQL has no MPP (massively parallel processing ) support. Unlike Oracle MySQL has no fractional-second storage type for times, dates, or intervals. There is no RAC (Real Application Cluster) support in My SQL, and no failover or server promotion either. These are strong features in Oracle MySQL's number of joins per query is limited to 61. Oracle's limit is much larger. MySQL Replication is asynchronous and has many limitations and edge cases. For example, it is single-threaded, so a powerful slave can find it hard to replicate fast enough to keep up with a less powerful master.
Views: 20311 Biz of Tech

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