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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: 3557 Athar Fahad
Optimizer Statistics
 
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Optimizer Statistics watch more videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Parth Panjab, Tutorials Point India Private Limited
Stop Rebuilding Global Indexes! Oracle 12c Global Index Maintenance
 
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Stop rebuilding Global Indexes! Stop worrying about invalidating Global Indexes! Oracle 11g gave us "UPDATE GLOBAL INDEXES". 12c provides a huge improvement: orphaned_entries! In this tutorial, Oracle Certified Master John Watson demonstrates how 11g and 12c handle Global Index maintenance with orphaned entries and overnight maintenance job PMO_DEFERRED_GIDX_MAINT_JOB.
Views: 2620 SkillBuilders
Oracle Database Performance Tuning - Optimizer Statistics Gathering - 11g, 12c
 
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Oracle Database Performance Tuning - Optimizer Statistics Gathering - 11g, 12c In this video we explain how to gather the database optimizer statistics #performancetuning, #oracledatabase, #oracle, #database, #optimizerstatistics, #learning, About Optimizer Statistics Collection In Oracle Database, optimizer statistics collection is the gathering of optimizer statistics for database objects, including fixed objects. The database can collect optimizer statistics automatically. You can also collect them manually using the DBMS_STATS package. Oracle Database Performance Tuning - Optimizer Statistics Gathering - 11g, 12c Purpose of Optimizer Statistics Collection The contents of tables and associated indexes change frequently, which can lead the optimizer to choose suboptimal execution plan for queries. To avoid potential performance issues, statistics must be kept current. To minimize DBA involvement, Oracle Database automatically gathers optimizer statistics at various times. Some automatic options are configurable, such enabling AutoTask to run DBMS_STATS. Oracle Database Performance Tuning - Optimizer Statistics Gathering - 11g, 12c Stats collection Stats gathering database performance tuning, 10g, 11g 12c database administration
Views: 511 KINGS TUBE
ORACLE WORLD - Understanding Oracle Optimizer Statistics part-1st
 
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Hello friends in this video i'm just showing to you what is optimizer statistics into oracle,optimizer help to improve the performance of sql statements during execution period.Oracle database #ORACLEWORLD #OracleOptimizerStatistics Unbeatable,Unbreakable Platform..
Views: 7178 Oracle World
Session-Private Statistics for Global Temporary Tables (GTTs) in Oracle 12c
 
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This video the session-private statistics functionality for Global Temporary Tables (GTTs) in Oracle 12c. For more information see: https://oracle-base.com/articles/12c/session-private-statistics-for-global-temporary-tables-12cr1 Website: https://oracle-base.com Blog: https://oracle-base.com/blog Twitter: https://twitter.com/oraclebase Cameo by Enrique Aviles Twitter: https://twitter.com/eaviles94 Cameo appearances are for fun, not an endorsement of the content of this video.
Views: 842 ORACLE-BASE.com
Are my index statistics wrong?  Why does NUM_ROWS equal zero?
 
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blog: connor-mcdonald.com Highlights from the April DBA Office Hours session. Office Hours is 100% free Q&A sessions held every month by Oracle experts to help you succeed with the Oracle suite of technologies. Music: Smells Like Summer - Del (Vlog Music No Copyrighted) Video Link: https://youtu.be/IrkMsqcOjGU
Views: 303 Connor McDonald
AWR, ADDM and ASH reports
 
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AWR, ADDM and ASH reports watch more videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Parth Panjab, Tutorials Point India Private Limited
09 06 Monitoring Index Usage
 
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ORACLE
Views: 141 oracle ocm
Oracle Performance - DBMS_STATS
 
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Oracle Performance - DBMS_STATS
Views: 4856 The Silent DBA
Oracle Database 12c: Partitioning Improvements with Tom Kyte
 
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Tom Kyte introduces the new partitioning improvements in Oracle Database 12c, followed by a demo of global index maintenance. For more information: "Asynchronous Global Index Maintenance for Dropping and Truncating Partitions" http://www.oracle.com/pls/topic/lookup?ctx=db121&id=VLDBG14107 "Changes for Very Large Databases and Partitioning in Oracle Database 12c Release 1" http://www.oracle.com/pls/topic/lookup?ctx=db121&id=VLDBG14100 "ALTER INDEX COALESCE Clause" http://www.oracle.com/pls/topic/lookup?ctx=db121&id=SQLRF52782 "DBMS_PART.CLEANUP_GIDX Procedure" http://www.oracle.com/pls/topic/lookup?ctx=db121&id=ARPLS74409
Views: 13966 OracleDBVision
Reverse Key Index :Types of Btree Index in Oracle
 
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Please subscribe to my new channel. https://www.youtube.com/c/AnIndianAbroadd The Videos explains how Reverse Btree Index works and in what condition they shall be used. Reverse Btree index are used to solve index block contention. You can't perform range scans in reverse btree Index.
Views: 2715 Tech Coach
INDEX PARTITIONING oracle
 
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index partioning in oracle
Views: 412 oracle dba tutorial
Online Index Rebuild
 
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Webcast created by Sotiris Karras
Oracle Performance Tuning - Function Based Indexes
 
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A overview of the function based index and a common mistake which is made by most of us.
Views: 622 Saurabh Kumar
Oracle Database 12c OLTP Compression
 
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This short video uses swingbench to demonstrate that its possible to make excellent space savings of both the space needed to store rows and the associated indexes without compromising transaction performance. You can find out more information on Oracle Database compression in this white paper http://www.oracle.com/technetwork/database/options/compression/advanced-compression-wp-12c-1896128.pdf You can download the software used in this demonstration here http://www.dominicgiles.com/swingbench.html
Views: 687 Dominic Giles
What do you mean the Oracle Optimizer won't use my Index
 
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Learn some details about how the Oracle optimizer works with Themis instructor John Mullins.
Views: 734 Themis Education
How can I speed up a query if an index cannot help?
 
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blog: connor-mcdonald.com Highlights from the April DBA Office Hours session. Office Hours is 100% free Q&A sessions held every month by Oracle experts to help you succeed with the Oracle suite of technologies. Music: Smells Like Summer - Del (Vlog Music No Copyrighted) Video Link: https://youtu.be/IrkMsqcOjGU
Views: 1397 Connor McDonald
Oracle tutorial : Global Temporary Table In Oracle PL SQL
 
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Oracle tutorial : Global Temporary Table In Oracle PL SQL create temp table sql This video will explain to you how to create Temporary Tables in Oracle Oracle tutorial : Global Temporary Table In Oracle 1)The data in such a table is stored only as long as the session or transaction lasts and is private for each session. 2)The definition is visible to all sessions. 3)After commit or disconnection, the data is lost but the definition of the table remains. 4)Indexes created on a temporary. 5)Scope of TRUNCATE command is a single database session. There is no effect of TRUNCATE on other sessions. 6)Foreign key constraints are not applicable in case of Temporary tables 7)Temporary tables cannot contain column of persistent collection type Syntax : CREATE GLOBAL TEMPORARY TABLE table_name ( column_name column_data_type … … ) ON COMMIT DELETE ROWS; CREATE GLOBAL TEMPORARY TABLE Emp ( id number(5) NOT NULL, name varchar2(50) NOT NULL, city varchar2(50) NOT NULL ) ON COMMIT DELETE ROWS INSERT INTO Emp VALUES (1, ‘Test1’, ‘city1’); INSERT INTO Emp VALUES (2, ‘Test2’, ‘city2’); INSERT INTO Emp VALUES (3, ‘Test3’, ‘city3’); SELECT COUNT(*) FROM emp; Result = 3 rows COMMIT; SELECT COUNT(*) FROM emp; Result = 0 rows For more tutorial please visit #techquerypond https://techquerypond.com https://techquerypond.wordpress.com https://twitter.com/techquerypond oracle temporary table create temporary table sql temp table
Views: 4175 Tech Query Pond
07 04 Index Column Order Matters
 
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ORACLE
Views: 108 oracle ocm
Index Rebuild vs. Reorganize
 
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Some of my thoughts about performing either, or any at all. In some cases, I won't use indexes.
Views: 4460 SQLInSix Minutes
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: 100917 radhikaravikumar
Why Isn't My Query Using an Index?
 
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“Why isn’t my query using an index?” is a common question people have when tuning SQL. This session explores the factors that influence the optimizer’s decision to answer this question. It does so by comparing fetching rows from a database table to finding all the red M&Ms a packet, and contrasts using an index range scan and a full table scan. It also introduces the concepts of blocks and the clustering factor. The session offers a discussion of how these affect the optimizer's calculations, and includes a demo of how these concepts work in practice using real SQL queries. This session is intended for developers who want to learn the basics of how the optimizer chooses between an index range or full table scan. Speaker: Chris Saxon
Views: 305 Oracle Developers
Oracle Partitioning
 
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Oracle Partitioning watch more videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Parth Panjab, Tutorials Point India Private Limited
Oracle Database Indexes: Myths, Tips and Tricks
 
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In this tutorial, OCM John Watson will - via demonstrations - debunk these myths: Myth #1: Oracle Database does not index NULL Myth #2: A search that includes wildcards can't use an index if the wildcard precedes the string. Myth #3: Oracle will not use a function-based index unless the FBI is coded in the predicate. Myth #4: Indexes always help. The more indexes the better. See http://skillbuilders.com/free-oracle-tutorials for gigabytes of free Oracle video tutorials.
Views: 16395 SkillBuilders
skip_unusable_indexes is NOT skipping unusable indexes!
 
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blog: connor-mcdonald.com Highlights from the April DBA Office Hours session. Office Hours is 100% free Q&A sessions held every month by Oracle experts to help you succeed with the Oracle suite of technologies. Music: Smells Like Summer - Del (Vlog Music No Copyrighted) Video Link: https://youtu.be/IrkMsqcOjGU
Views: 329 Connor McDonald
Global Temporary Tables (GTT) in Oracle
 
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This video shows how global temporary tables (GTT) can improve the performance of DML against tables holding temporary data. For more information see: https://oracle-base.com/articles/misc/temporary-tables PS. My PhD kind-of involved the sexual habits of cabbages, hence the vicious rumour spread my uncle Martin! Website: https://oracle-base.com Blog: https://oracle-base.com/blog Twitter: https://twitter.com/oraclebase Cameo by Martin Widlake (my crazy uncle) Blog: https://mwidlake.wordpress.com/ Twitter: https://twitter.com/MDWidlake Cameo appearances are for fun, not an endorsement of the content of this video.
Views: 7670 ORACLE-BASE.com
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: 400 SkillBuilders
088-Oracle SQL 12c: Global Temporary Table
 
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تعلم اوراكل حتى الاحتراف تعلم اوراكل من الصفر EXAM 1Z0-061 EXAM 1Z0-071
Views: 1176 khaled alkhudari
Space Management in Extents and Segments - DBArch Video 31 / DBPerf Video 13
 
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In this video you will understand about the following - Dictionary managed Vs Locally Managed Tablespaces - Manual Vs Automatic Segment Space Management - PCTFREE and PCTUSED - Row Migration and Row Chaining . 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: 9673 Ramkumar Swaminathan
Oracle DBA - Solve Long Running Query & TX Row Lock Contention | Performance Tuning
 
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How to Solve Row Lock Contention in Oracle Database - Performance Tuning - Oracle DBA Solve Row Lock Contention & Long Running Query in Oracle Database - Performance Tuning Oracle DBA - Performance Tuning Row Lock Contention Please Like, Comment, Subscribe and Share... Boxcut Media.
Views: 8700 BoxCut Media
Should You Rebuild or Reorganize Large Indexes? (Dear SQL DBA Episode 19)
 
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The bigger your indexes are, the harder your index maintenance falls. Is it better to rebuild big indexes? Or should you reorganize? Learn the pros and cons of each command.
Invalid Objects in Oracle 11g
 
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Procedure compile,invalid object,how to make it valid when procedures are invalid,Oracle DBA issues,DBA task to make object valid,oracle 12c,Cloud technology,Dataguard,Real Application cluster
Views: 1549 Athar Fahad
What is a LIST Partition in Oracle
 
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List Partition with examples. What is LIST 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: 1121 TechLake
Two Dudes and a Database
 
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Two Aussie Oracle ACE Alumni catch up in Perth at the end of a half-day session on database features and data clustering. blog: https://connor-mcdonald.com twitter: https://twitter.com/connor_mc_d Richard's Blog: https://richardfoote.wordpress.com Richard's Indexing Webinar: https://richardfooteconsulting.com/indexing-webinar/ Trivadis Performance Days: https://www.trivadis.com/en/training/performance-days-2018-tvdpdays Gather Plan Statistics hint: https://docs.oracle.com/en/database/oracle/oracle-database/18/tgsql/optimizer-statistics-concepts.html DBMS_REDEFINTION docs: https://docs.oracle.com/en/database/oracle/oracle-database/18/arpls/DBMS_REDEFINITION.html Subscribe for new tech videos every week Music: https://soundcloud.com/joakimkarud Any endorsement of non-Oracle products and/or companies in this video should not be viewed as an official endorsement from Oracle Corporation.
Views: 397 Connor McDonald
ADS1: Hash tables for indexing
 
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We discuss how a hash table can hold a k-mer index, as well as how to query it. Course page: https://www.coursera.org/course/ads1.
Views: 5378 Ben Langmead
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: 1141 Oracle PL/SQL World
Comparing Temporary Tables in Oracle and SQL Server
 
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Presented by Jonathan Lewis (Oracle ACE Director, OakTable) and Grant Fritchey (SQL Server MVP) Thurs 11th October 2012 Summary Temporary tables are often used in applications for processes that are difficult to complete in a single pass. They are widely used in SQL Server development and can be local and global. In Oracle temporary tables are created with a static global definition, but are used to hold temporary local content. But is this the only difference in temporary tables in Oracle and SQL Server? What about the performance impacts/gains for using temporary tables, and does this differ in Oracle and SQL Server? Once again Jonathan Lewis (Oracle Ace Director, OakTable Network) and Grant Fritchey (Microsoft SQL Server MVP) will host a live discussion on Oracle and SQL Server, this time in relation to temporary tables. Will they agree on some common ground? Or will it be an out and out argument? Either way, be prepared for a lively exchange that will not only entertain, but will teach you key concepts on Oracle and SQL Server. A Q+A session with Jonathan and Grant will follow the presentation. For our complete archive, and to sign up for upcoming webinars please go to http://www.red-gate.com/oracle-webinars
Views: 2740 Redgate Videos
How to create Virtual Columns in Oracle Database
 
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How to create Virtual Columns in Oracle Database 12c When queried, virtual columns appear to be normal table columns, but their values are derived rather than being stored on disc. The syntax for defining a virtual column is listed below. column_name [datatype] [GENERATED ALWAYS] AS (expression) [VIRTUAL] If the datatype is omitted, it is determined based on the result of the expression. The GENERATED ALWAYS and VIRTUAL keywords are provided for clarity only. The script below creates and populates an employees table with two levels of commission. It includes two virtual columns to display the commission-based salary. The first uses the most abbreviated syntax while the second uses the most verbose form. CREATE TABLE employees ( id NUMBER, first_name VARCHAR2(10), last_name VARCHAR2(10), salary NUMBER(9,2), comm1 NUMBER(3), comm2 NUMBER(3), salary1 AS (ROUND(salary*(1+comm1/100),2)), salary2 NUMBER GENERATED ALWAYS AS (ROUND(salary*(1+comm2/100),2)) VIRTUAL, CONSTRAINT employees_pk PRIMARY KEY (id) ); INSERT INTO employees (id, first_name, last_name, salary, comm1, comm2) VALUES (1, 'JOHN', 'DOE', 100, 5, 10); INSERT INTO employees (id, first_name, last_name, salary, comm1, comm2) VALUES (2, 'JAYNE', 'DOE', 200, 10, 20); COMMIT; Querying the table shows the inserted data plus the derived commission-based salaries. SELECT * FROM employees; ID FIRST_NAME LAST_NAME SALARY COMM1 COMM2 SALARY1 SALARY2 ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- 1 JOHN DOE 100 5 10 105 110 2 JAYNE DOE 200 10 20 220 240 2 rows selected. SQL The expression used to generate the virtual column is listed in the DATA_DEFAULT column of the [DBA|ALL|USER]_TAB_COLUMNS views. COLUMN data_default FORMAT A50 SELECT column_name, data_default FROM user_tab_columns WHERE table_name = 'EMPLOYEES'; COLUMN_NAME DATA_DEFAULT ------------------------------ -------------------------------------------------- ID FIRST_NAME LAST_NAME SALARY COMM1 COMM2 SALARY1 ROUND("SALARY"*(1+"COMM1"/100),2) SALARY2 ROUND("SALARY"*(1+"COMM2"/100),2) 8 rows selected. SQL Notes and restrictions on virtual columns include: 1)Indexes defined against virtual columns are equivalent to function-based indexes. 2)Virtual columns can be referenced in the WHERE clause of updates and deletes, but they cannot be manipulated by DML. 3)Tables containing virtual columns can still be eligible for result caching. 4)Functions in expressions must be deterministic at the time of table creation, but can subsequently be recompiled and made non-deterministic without invalidating the virtual column. In such cases the following steps must be taken after the function is recompiled: a)Constraint on the virtual column must be disabled and re-enabled. b)Indexes on the virtual column must be rebuilt. c)Materialized views that access the virtual column must be fully refreshed. d)The result cache must be flushed if cached queries have accessed the virtual column. e)Table statistics must be regathered. 5)Virtual columns are not supported for index-organized, external, object, cluster, or temporary tables. 6)The expression used in the virtual column definition has the following restrictions: a.It cannot refer to another virtual column by name. b.It can only refer to columns defined in the same table. c.If it refers to a deterministic user-defined function, it cannot be used as a partitioning key column. e.The output of the expression must be a scalar value. It cannot return an Oracle supplied datatype, a user-defined type, or LOB or LONG RAW.
Views: 552 OracleDBA
Oracle Enterprise Manager OEM
 
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Oracle Enterprise Manager OEM watch more videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Parth Panjab, Tutorials Point India Private Limited
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: 1887 Ramkumar Swaminathan
Analyze Tables
 
11:28
Views: 147 Jennifer Pottorff
Why Won't Oracle 12c Use My Index - 12c Attribute Clustering - Lesson 2 Demonstration
 
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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 - Learn 12c CREATE TABLE - "CLUSTERING BY LINEAR ORDER". In this lesson 2 (of 4), you see a great demonstration of CREATE TABLE - "CLUSTERING BY LINEAR ORDER" - so the CBO will use your index! To see all free lessons, visit http://www.skillbuilders.com/12c-attribute-clustering.
Views: 285 SkillBuilders
AskTOM TV - The TOP-FREQUENCY histogram in 12c
 
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blog: https://connor-mcdonald.com A video to help you understand the "thought process" behind answering AskTom questions. In this episode, how does the optimizer deal with the 12c in-database archiving feature ========================================­­­­============== Copyright © 2017 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: 734 Connor McDonald
Let's Learn Teradata Lesson 33: The Primary Index and Partitioning
 
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Explore Teradata with Tera-Tom of Coffing Data Warehousing! In this lesson, learn about how the Primary Index and Partitioning interact!
08 07 Index Compression
 
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ORACLE
Views: 483 oracle ocm
Let's Learn Teradata Lesson 82: Collect Statistics
 
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Explore Teradata with Tera-Tom of Coffing Data Warehousing! In this lesson, learn about the Collect Statistics function in Teradata!

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