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Result Cache
 
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Parses and Data Dictionary watch more videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Parth Panjab, Tutorials Point India Private Limited
Oracle Performance - Result Cache Exercises
 
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Oracle Performance - Result Cache Exercises
Views: 744 The Silent DBA
Oracle 11g Result Cache Tutorial by SkillBuilders.com
 
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Dave Anderson of SkillBuilders.com/11g demonstrates how to improve query performance with the Oracle 11g Result Cache.
Views: 2504 SkillBuilders
Oracle Function Result Cache | Steven Feuerstein
 
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Returning for his seventh 2 Minute Tech Tip, Oracle architect and "Oracle PL/SQL Programming 6e" author Steven Feuerstein delivers the details on the Function Result Cache, a feature introduced in Oracle Database 11g that can add a performance boost to your applications.
Views: 1039 ArchBeat Archive
Efficient Function Calls From SQL (Part 3) : PL/SQL Function Result Cache
 
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The third part of a mini-series of videos showing how you can improve the performance of function calls from SQL. In this episode, we take a look at the Cross-Session PL/SQL Function Result Cache introduced in Oracle 11g. For more information see: https://oracle-base.com/articles/misc/efficient-function-calls-from-sql#oracle-11g-caching https://oracle-base.com/articles/11g/cross-session-plsql-function-result-cache-11gr1 Website: https://oracle-base.com Blog: https://oracle-base.com/blog Twitter: https://twitter.com/oraclebase Cameo by Auckland Oracle DBAs Meetup : Website: http://www.meetup.com/Auckland-Oracle-DBAs-Meetup/ Sponsors: - DBvisit: http://www.dbvisit.com/ - Datacom: http://www.datacom.co.nz/ - Oracle New Zealand: http://www.oracle.com/ - Pythian: http://www.pythian.com/ - Enterprise IT: http://www.enterpriseit.co.nz/ Cameo appearances are for fun, not an endorsement of the content of this video.
Views: 3095 ORACLE-BASE.com
Rev up your Oracle Functions using Result Cache
 
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Dan shows you how to dramatically increase function response time using a newer Oracle memory structure called Result Cache. Still on Oracle10? Dan has a solution for you as well.
Views: 124 Dan Hotka
Test: Library Cache Pin during recompile stored procedure
 
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SELECT sys_context('USERENV', 'SID') FROM dual; set lines 130 set pages 1000 SELECT substr(DECODE(o.kglobtyp, 7, 'PROCEDURE', 8, 'FUNCTION', 9, 'PACKAGE', 12, 'TRIGGER', 13, 'CLASS'),1,15) "TYPE", substr(o.kglnaown,1,30) "OWNER", substr(o.kglnaobj,1,30) "NAME", s.indx "SID", s.ksuseser "SERIAL" FROM sys.X$KGLOB o, sys.X$KGLPN p, sys.X$KSUSE s WHERE o.inst_id = USERENV('Instance') AND p.inst_id = USERENV('Instance') AND s.inst_id = USERENV('Instance') AND o.kglhdpmd = 2 AND o.kglobtyp IN (7, 8, 9, 12, 13) AND p.kglpnhdl = o.kglhdadr AND s.addr = p.kglpnses ORDER BY 1, 2, 3 ; http://surachartopun.com/2008/12/recompiled-stored-procedure-library.html
Views: 861 Surachart Opun
Oracle 11g SQL Results Cache Training by SkillBuilders Dave Anderson
 
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Learn how, by using the Oracle Database 11g Results Cache, you can get phenomenal performance from repeated executions of queries against large, static data. From Dave Anderson of SkillBuilders.com/Oracle.
Views: 3295 SkillBuilders
Oracle DV - Increasing Config Limit on OAC Datasets Cache
 
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This describes one of the features of Oracle Analytics Cloud. You can download the Desktop version of Oracle DV from here : http://www.oracle.com/technetwork/middleware/oracle-data-visualization/downloads/oracle-data-visualization-desktop-2938957.html
Views: 517 Oracle Analytics
How to use Collections and Function Result Cache by Steven Feuerstein
 
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See all free Oracle PL/SQL tutorials at http://www.skillbuilders.com/oracle-tutorials. In this tutorial, Oracle ACE Director Steven Feuerstein demonstrates how to improve PL/SQL performance by 1, caching data in PL/SQL package-based Associate Array Collections (collection cache) and 2, using the Function Result Cache.
Views: 1073 SkillBuilders
Advanced SQL SubQueries in Oracle Database
 
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Learn to code advanced correlated SQL subqueries in the Oracle Database. From SkillBuilders.com/Oracle.
Views: 9340 SkillBuilders
Top PL/SQL Tips In Just One Hour
 
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Here's a video I recorded of a webcast to a team of developers who had one hour to spare to learn about some PL/SQL best practices. I offer tips on using compile time warnings, avoiding hard-coding/repetition, using nested subprograms and in the performance arena, lightning fast coverage of FORALL, function result cache, NOCOPY and PRAGMA UDF. Fun stuff and here's the guide: 03:00 Compile-time warnings 16:25 Don’t repeat anything 21:15 Tips on writing SQL in PL/SQL 24:50 Avoid hard-coding of formulas 28:35 Keep executable sections tiny 35:15 Avoid row-by-row processing 42:10 Function result cache 54:28 NOCOPY parameter hint 56:02 Optimizing user-defined function execution in SQL Files referenced in presentation may be found at http://www.oracle.com/webfolder/technetwork/tutorials/plsql/sfdemo.zip. But for the latest set of PL/SQL scripts, go to LiveSQL.oracle.com and search by keywords (forall, nocopy, etc.). More on PL/SQL at my blog https://stevenfeuersteinonplsql.blogspot.com PL/SQL quizzes, workouts and classes at https://devgym.oracle.com ======================================== Practically Perfect PL/SQL with Steven Feuerstein Copyright © 2018 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.
How to Cache Database Queries with Redis in Laravel - Redis Series Episode 4
 
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In this short episode, I show you how you can cache database queries for a certain period of time. This is really nice when you have data you know won't change during x period of time, because once it's in cache, Laravel knows to automatically skip the database query and immediately deliver the requested content from RAM. Super fast, super easy. Here's the complete project throughout all episodes: https://gitlab.com/Christf24/RedisCast/tree/master/ Next episode will go over tagging with Redis (for blog posts, movie genres, or whatever else). Previous episode (Counting page views, and creating a "Top Viewed Article" list on home page): https://www.youtube.com/watch?v=ZMjw5WFPG8c Next episode (Tagging articles, products, movies, etc..): http://youtu.be/L2keoHFThwY
Views: 24048 Christophe Limpalair
VTS: SQL Tuning Without Trying - Arup Nanda
 
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This VTS session features learn about the SQL Tuning Advisor feature in Oracle Database, and how to use it effectively and interpret the results for superior performance in the context of the real world presented by a real-life DBA. Presented by Oracle Ace Director Arup Nanda.
Views: 8362 Database Community
Efficient Function Calls From SQL (Part 4) : Scalar Subquery Caching vs PL/SQL Function Result Cache
 
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The fourth part of a mini-series of videos showing how you can improve the performance of function calls from SQL. In this episode, we compare Scalar Subquery Caching with the the Cross-Session PL/SQL Function Result Cache to see which we should use for best performance. For more information see: https://oracle-base.com/articles/misc/efficient-function-calls-from-sql#scalar-subquery-caching-revisited Website: https://oracle-base.com Blog: https://oracle-base.com/blog Twitter: https://twitter.com/oraclebase Cameo by Alex Gorbachev : Blog: http://www.oracloid.com/ Twitter: https://twitter.com/alexgorbachev Website: http://www.pythian.com/about/alex-gorbachev/ Cameo appearances are for fun, not an endorsement of the content of this video.
Views: 1614 ORACLE-BASE.com
Caching Business Service Results and Enabling Load Balancing in Oracle Service Bus
 
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This video shows you how to improve performance by enabling result caching and configuring load balancing in Oracle Service Bus. ================================= For more information, see http://www.oracle.com/goto/oll 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.
Use NOCOPY to Improve Performance
 
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The NOCOPY parameter hint tells the PL/SQL compiler to pass OUT and IN-OUT parameters "by reference" (meaning: do not copy in, nor copy out). The result is better performance and reduced PGA consumption. ====================================== Practically Perfect PL/SQL with Steven Feuerstein 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.
Table size ,Number of records,Disk usage in SQL Database,clear logs,cache
 
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This clip will show you how to check each Table size, Number of records, Disk usage in SQL Database. You can see how to write the query to get details of all tables in terms of size, records, space utilization and free space on disk for tables. http://daynamicsaxaptatutorials.blogspot.com This is axapta ERP blog for Technical and functional fields and includes Microsoft Dynamics Axapta tutorials and Dynamics Axapta Coverage. This blog also contains x++ code help for Ax developer and solution of technical and functional daily issues. This blog is specific for Microsoft dynamics programming. Enterprise portal, SharePoint services, business connectors and Enterprise Resource Planning applications and sql database.It will help to get Microsoft Business Solutions.
Views: 955 Santosh kumar Singh
Webinar: All About the Function Result Cache
 
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Presented by Steven Feuerstein, Oracle Corporation The function result cache, added in Oracle Database 11g, offers developers a way to dramatically reduce the amount of time it takes to retrieve data requested repeatedly by database sessions (specifically, when the same rows of a table are fetched much more frequently than they are changed). This cache is stored in the SGA, shared across all sessions in the instance, and automatically purged of "dirty data" by the Oracle Database. Every application running on 11.1 or higher should be taking advantage of this feature. Best of all, there is minimal impact on your code to start using this feature.
Views: 1083 ODTUG
Dynamic sql output parameter
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2017/05/dynamic-sql-output-parameter.html Slides http://csharp-video-tutorials.blogspot.com/2017/05/dynamic-sql-output-parameter_8.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All SQL Server Tutorial Videos https://www.youtube.com/playlist?list=PL08903FB7ACA1C2FB All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this video we will discuss, how to use output parameters with dynamic sql. Let us understand this with an example. SQL script to create Employees table Create table Employees ( ID int primary key identity, FirstName nvarchar(50), LastName nvarchar(50), Gender nvarchar(50), Salary int ) Go Insert into Employees values ('Mark', 'Hastings', 'Male', 60000) Insert into Employees values ('Steve', 'Pound', 'Male', 45000) Insert into Employees values ('Ben', 'Hoskins', 'Male', 70000) Insert into Employees values ('Philip', 'Hastings', 'Male', 45000) Insert into Employees values ('Mary', 'Lambeth', 'Female', 30000) Insert into Employees values ('Valarie', 'Vikings', 'Female', 35000) Insert into Employees values ('John', 'Stanmore', 'Male', 80000) Go We want to write a dynamic sql statement that returns total number of male of female employees. If the gender value is specified as "Male", then the query should return total male employees. Along the same lines, if the the value for gender is "Female", then we should get total number of female employees. The following dynamic sql, will give us what we want. In this case, the query returns total number of "Male" employees. If you want the total number of female employees, simply set @gender='Female'. Declare @sql nvarchar(max) Declare @gender nvarchar(10) Set @gender = 'Male' Set @sql = 'Select Count(*) from Employees where [email protected]' Execute sp_executesql @sql, N'@gender nvarchar(10)', @gender At the moment we are not using output parameters. If you want the count of employees to be returned using an OUTPUT parameter, then we have to do a slight modification to the query as shown below. The key here is to use the OUTPUT keyword in your dynamic sql. This is very similar to using OUTPUT parameters with a stored procedure. Declare @sql nvarchar(max) Declare @gender nvarchar(10) Declare @count int Set @gender = 'Male' Set @sql = 'Select @count = Count(*) from Employees where [email protected]' Execute sp_executesql @sql, N'@gender nvarchar(10), @count int OUTPUT', @gender, @count OUTPUT Select @count The OUTPUT parameter returns NULL, if you forget to use OUTPUT keyword.. The following query returns NULL, as we removed the OUTPUT keyword from @count parameter Declare @sql nvarchar(max) Declare @gender nvarchar(10) Declare @count int Set @gender = 'Male' Set @sql = 'Select @count = Count(*) from Employees where [email protected]' Execute sp_executesql @sql, N'@gender nvarchar(10), @count int OUTPUT', @gender, @count Select @count
Views: 16706 kudvenkat
Oracle 11g New Features : SQL Plan Management  (Baselining)
 
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Oracle 11g SQL Plan Management, a.k.a. Baselining, will solve the major issues of change control. We can give you an absolute guarantee - if you configure this as part of your upgrade - that SQL statement execution (performance) will never regress. You may also like our new and free Oracle 12c video tutorials, https://www.skillbuilders.com/free-oracle-database-tutorials . This tutorial is particularly relevant: it provides a review of baselining then reveals 12c performance features https://www.skillbuilders.com/free-oracle-database-tutorials/oracle-12c-sql-performance-features-agenda-session/
Views: 10280 SkillBuilders
Oracle Tuning Mistakes and Solutions
 
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Oracle 12c Multi-Threaded Database (parameter threaded_execution=true) provides an fantastic performance improvement by reducing the number of background processes. In this free tutorial, Oracle Certified Master John Watson of SkillBuilders demonstrates how to enable this feature and the resulting performance benefit - in John's demo, a doubling of performance! See all free Oracle 12c tutorials at http://www.skillbuilders.com/free-oracle-tutorials.
Views: 3751 SkillBuilders
Oracle Database 18c Express Edition Installation on Windows 10 | Oracle Database 18c XE
 
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After long time, Oracle has released finally Oracle Database 18c Express Edition for Windows x64, Oracle Database Express Edition (XE) Release 18.4.0.0.0 In this video we are going to demonstrate how to install Oracle Database 18c Express Edition on Windows 10 Oracle Database 18c Express Edition installation in Windows is very easy. This video guides step by step installation. We are going to learn 1. Database Installation 2. Enterprise Manager Overview 3. SQL Plus tool 4. Oracle Instance Manager to start and shutdown database instance. Hardware Requirements : Minimum 2 GB RAM, 2 CPU Cores and Enough Hard disk Space. Software Requirements : OracleXE184_Win64 Zip file for Windows already downloaded from Oracle website. Important Note: Adobe Flash player must be installed in order to browse Enterpise Manager Console on Internet Explorer. Installation method : Offline, Oracle Database 18c Zip file for Windows downloaded and installed. download link: https://www.oracle.com/technetwork/database/database-technologies/express-edition/downloads/index-083047.html Oracle Database 18c XE Features ############################### Oracle Multitenant SQLJ Microsoft Distributed Transaction Coordinator support Native .NET Data Provider—ODP.NET .NET Stored Procedures Online index rebuild Online table organization Online table redefinition Trial recovery Fast-start fault recovery Flashback Table Flashback Database Cross-platform Backup and Recovery Sharded Queues Network Compression Client Side Query Cache Query Results Cache PL/SQL Function Result Cache Adaptive Execution Plans In-Memory Column Store In-Memory Aggregation Attribute Clustering Column-Level Encryption Tablespace Encryption Oracle Advanced Security Oracle Database Vault Oracle Label Security Centrally Managed Users Fine-grained auditing Privilege Analysis Real Application Security Redaction Transparent Sensitive Data Protection Virtual Private Database Oracle Spatial and Graph Property Graph and RDF Graph Technologies (RDF/OWL) Partitioned spatial indexes Oracle Partitioning Oracle Advanced Analytics Oracle Advanced Compression Advanced Index Compression Prefix Compression (also called Key Compression) Basic Table Compression Deferred Segment Creation Bitmapped index, bitmapped join index, and bitmap plan conversions Transportable tablespaces, including cross-platform and full transportable export and import Summary management—Materialized View Query Rewrite.
Views: 2219 java frm
Oracle Tuning: Smart Flash Cache no Solaris
 
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Oracle Tuning: Smart Flash Cache no Solaris
Views: 448 Nerv
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: 66302 SkillBuilders
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: 8534 TechLake
Oracle Database 18c Express Edition Installation on CentOS 7.5 | Oracle Database 18c XE Released
 
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In this video we are going to demonstrate how to install Oracle Database 18c Express Edition in CentOS 7.5. Oracle Database 18c Express Edition installation in CentOS 7 Platform is very easy. This video guides step by step installation of oracle 18c includes kernel parameters configuration, dependencies installation, oracle database installation, oracle listener configuration after installation and finally access oracle enterprise manager 18c in browser. Hardware Requirements : Minimum 2 GB RAM, 2 CPU Cores and Enough Hard disk Space. Software Requirements : CentOS 7 with dependencies for oracle database 18c installed and Kernel Parameters configured. Important Note: To avoid Port already in use error I will be configuring hostname at the end of installation. Installation method : Offline, Oracle Database 18c XE RPM file for linux downloaded and installed. Oracle Database 18c XE Features ############################### Oracle Multitenant SQLJ Microsoft Distributed Transaction Coordinator support Native .NET Data Provider—ODP.NET .NET Stored Procedures Online index rebuild Online table organization Online table redefinition Trial recovery Fast-start fault recovery Flashback Table Flashback Database Cross-platform Backup and Recovery Sharded Queues Network Compression Client Side Query Cache Query Results Cache PL/SQL Function Result Cache Adaptive Execution Plans In-Memory Column Store In-Memory Aggregation Attribute Clustering Column-Level Encryption Tablespace Encryption Oracle Advanced Security Oracle Database Vault Oracle Label Security Centrally Managed Users Fine-grained auditing Privilege Analysis Real Application Security Redaction Transparent Sensitive Data Protection Virtual Private Database Oracle Spatial and Graph Property Graph and RDF Graph Technologies (RDF/OWL) Partitioned spatial indexes Oracle Partitioning Oracle Advanced Analytics Oracle Advanced Compression Advanced Index Compression Prefix Compression (also called Key Compression) Basic Table Compression Deferred Segment Creation Bitmapped index, bitmapped join index, and bitmap plan conversions Transportable tablespaces, including cross-platform and full transportable export and import Summary management—Materialized View Query Rewrite
Views: 1569 java frm
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: 12083 ORACLE-BASE.com
Execution Plan Example 2
 
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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: 569 Oracle Training
Efficient Function Calls From SQL (Part 1) : Scalar Subquery Caching
 
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The first part of a mini-series of videos showing how you can improve the performance of function calls from SQL. In this episode, we take a look at Scalar Subquery Caching. For more information see: https://oracle-base.com/articles/misc/efficient-function-calls-from-sql#scalar-subquery-caching Website: https://oracle-base.com Blog: https://oracle-base.com/blog Twitter: https://twitter.com/oraclebase Cameo by Bruno Borges : Blog: https://blogs.oracle.com/brunoborges/ Website: http://brunoborges.com/ Twitter: https://twitter.com/brunoborges Cameo appearances are for fun, not an endorsement of the content of this video.
Views: 2490 ORACLE-BASE.com
Export Oracle query result to DBF file (dBase/FoxBase/FoxPro)
 
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Want to export Oracle query result to DBF file (dBase/FoxBase/FoxPro)? You can try Withdata OracleToDbf, no need to program, just a few mouse clicks! For more Withdata OracleToDbf information, https://www.withdata.com/oracletodbf/ . To download, https://www.withdata.com/down/OracleToDbf.exe .
Views: 29 Shiji Pan
Oracle Database 18c Express Edition Installation on Oracle Linux 7.5 | Oracle Database 18c XE
 
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In this video we are going to demonstrate how to install Oracle Database 18c Express Edition in Oracle Linux 7.5. Oracle Database 18c Express Edition installation in Oracle Linux 7 Platform is very easy. This video guides step by step installation of oracle database XE 18c includes dependencies installation, oracle database installation, oracle listener configuration after installation and finally access oracle enterprise manager 18c in browser and start/shutdown instances. Hardware Requirements : Minimum 2 GB RAM, 2 CPU Cores and Enough Hard disk Space. Software Requirements : Oracle Enterprise Linux 7 with dependencies for oracle database 18c installed and Kernel Parameters configured. Important Note: To avoid Port already in use error I will be configuring hostname at the end of installation. Installation method : Offline, Oracle Database 18c XE RPM file for linux downloaded and installed. Oracle Database 18c Express Edition is free to use with some Limitations (Only 2 CPU Cores, 2GB RAM will be utilized and 12 GB User Data). Oracle Database 18c XE Features ############################### Oracle Multitenant SQLJ Microsoft Distributed Transaction Coordinator support Native .NET Data Provider—ODP.NET .NET Stored Procedures Online index rebuild Online table organization Online table redefinition Trial recovery Fast-start fault recovery Flashback Table Flashback Database Cross-platform Backup and Recovery Sharded Queues Network Compression Client Side Query Cache Query Results Cache PL/SQL Function Result Cache Adaptive Execution Plans In-Memory Column Store In-Memory Aggregation Attribute Clustering Column-Level Encryption Tablespace Encryption Oracle Advanced Security Oracle Database Vault Oracle Label Security Centrally Managed Users Fine-grained auditing Privilege Analysis Real Application Security Redaction Transparent Sensitive Data Protection Virtual Private Database Oracle Spatial and Graph Property Graph and RDF Graph Technologies (RDF/OWL) Partitioned spatial indexes Oracle Partitioning Oracle Advanced Analytics Oracle Advanced Compression Advanced Index Compression Prefix Compression (also called Key Compression) Basic Table Compression Deferred Segment Creation Bitmapped index, bitmapped join index, and bitmap plan conversions Transportable tablespaces, including cross-platform and full transportable export and import Summary management—Materialized View Query Rewrite.
Views: 1403 java frm
Efficient Function Calls From SQL (Part 2) : The DETERMINISTIC Hint
 
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The second part of a mini-series of videos showing how you can improve the performance of function calls from SQL. In this episode, we take a look at the DETERMINISTIC hint. For more information see: https://oracle-base.com/articles/misc/efficient-function-calls-from-sql#deterministic-hint Website: https://oracle-base.com Blog: https://oracle-base.com/blog Twitter: https://twitter.com/oraclebase Cameo by Dana Singleterry : Blog: https://blogs.oracle.com/dana/ Twitter: https://twitter.com/dsingleterry Cameo appearances are for fun, not an endorsement of the content of this video.
Views: 2414 ORACLE-BASE.com
ROWNUM - so simple yet so much confusion!
 
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ROWNUM just assigns a counter to the rows in your query result. So why did so many people get our simple quiz on rownum wrong ? blog: https://connor-mcdonald.com twitter: https://twitter.com/connor_mc_d Subscribe as new tech videos come every week!
Views: 663 Connor McDonald
Oracle Database 18c Express Edition Installation on Oracle Linux 6.10 | Oracle Database 18c XE
 
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In this video we are going to demonstrate how to install Oracle Database 18c Express Edition in Oracle Linux 6.10. Oracle Database 18c Express Edition installation in Oracle Linux 6 Platform is very easy. This video guides step by step installation of oracle 18c includes kernel parameters configuration, dependencies installation, oracle database installation, oracle listener configuration after installation and finally access oracle enterprise manager 18c in browser. Hardware Requirements : Minimum 2 GB RAM, 2 CPU Cores and Enough Hard disk Space. Software Requirements : Oracle Enterprise Linux 6 with dependencies for oracle database 18c installed and Kernel Parameters configured. Important Note: To avoid Port already in use error I will be configuring hostname at the end of installation. Installation method : Offline, Oracle Database 18c XE RPM file for linux downloaded and installed. Oracle Database 18c XE Features ############################### Oracle Multitenant - # of PDBs SQLJ Microsoft Distributed Transaction Coordinator support Native .NET Data Provider—ODP.NET .NET Stored Procedures Online index rebuild Online table organization Online table redefinition Trial recovery Fast-start fault recovery Flashback Table Flashback Database Cross-platform Backup and Recovery Sharded Queues Network Compression Client Side Query Cache Query Results Cache PL/SQL Function Result Cache Adaptive Execution Plans In-Memory Column Store In-Memory Aggregation Attribute Clustering Column-Level Encryption Tablespace Encryption Oracle Advanced Security Oracle Database Vault Oracle Label Security Centrally Managed Users Fine-grained auditing Privilege Analysis Real Application Security Redaction Transparent Sensitive Data Protection Virtual Private Database Oracle Spatial and Graph Property Graph and RDF Graph Technologies (RDF/OWL) Partitioned spatial indexes Oracle Partitioning Oracle Advanced Analytics Oracle Advanced Compression Advanced Index Compression Prefix Compression (also called Key Compression) Basic Table Compression Deferred Segment Creation Bitmapped index, bitmapped join index, and bitmap plan conversions Transportable tablespaces, including cross-platform and full transportable export and import Summary management—Materialized View Query Rewrite
Views: 185 java frm
Making Smart Scan for Exadata Work (Demonstration)
 
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Making Smart Scan Work - Demo I'll go through a simple example of the kind of thing we need to think about when trying to achieve Smart Scan. Let me just enable tracing, run a simple query, select and * from *. Now, there's my query. The result set comes back, and how is it executed? An index full scan with the PK* index. The optimizer is intelligent enough to know that my query can be satisfied purely by reading the index and therefore it didn't have to go to the table at all. It looks very good. Well, it wasn't. Index full scans are an operation that cannot be offloaded. So, to execute that statement, every block of that index was delivered into the buffer cache of my own database instance, and the compute node then has to do the work of extracting those values. What can we do about it? One solution would be to hint the code. I select and demand an index fast full scan, and now we see the magic word "storage." An index fast full scan is offloadable, because an index fast full scan can do direct reads. An alternative approach? Well, you might not want to hint many, many thousands of lines of code. An alternative approach would be to do it through DDL. For example, take that index, make it invisible. Now run my statements without any hint at all, table access storage full, and that was offloaded. Having made the index invisible, Oracle has no option but a full-table scan, and a full-table scan is offloadable. Now, this means I have three options of this very simple example. I can let the optimizer get on with what it wants to do, and then I use an index that I'm doing block serving into the buffer cache. I can hint the code, index fast full scan. That's probably the best option for performance, but it's also the most work. In this intervening case, I make the index invisible so that it will still be used of course for enforcing the primary key constraints, but it will not be visible to the optimizer and therefore influence the optimizer towards using plans that can be offloaded the Smart Scan. Making the choice between this and influencing the optimizer in the correct direction is an extremely difficult job, and it is not always easy to determine what is going to be the best solution.
Views: 3444 SkillBuilders
What to choose for performance   SubQuery or Joins   Part 62
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2013/01/what-to-choose-for-performance.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-62-what-to-choose-for-performance.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists What to choose for performance - SubQuery or Joins According to MSDN, in sql server, in most cases, there is usually no performance difference between queries that uses sub-queries and equivalent queries using joins. For example, on my machine I have 400,000 records in tblProducts table 600,000 records in tblProductSales tables The following query, returns, the list of products that we have sold atleast once. This query is formed using sub-queries. When I execute this query I get 306,199 rows in 6 seconds Select Id, Name, Description from tblProducts where ID IN ( Select ProductId from tblProductSales ) At this stage please clean the query and execution plan cache using the following T-SQL command. CHECKPOINT; GO DBCC DROPCLEANBUFFERS; Go DBCC FREEPROCCACHE; GO Now, run the query that is formed using joins. Notice that I get the exact same 306,199 rows in 6 seconds. Select distinct tblProducts.Id, Name, Description from tblProducts inner join tblProductSales on tblProducts.Id = tblProductSales.ProductId Please Note: I have used automated sql script to insert huge amounts of this random data. Please watch Part 61 of SQL Server tutorial, in which we have discussed about this automated script. According to MSDN, in some cases where existence must be checked, a join produces better performance. Otherwise, the nested query must be processed for each result of the outer query. In such cases, a join approach would yield better results. The following query returns the products that we have not sold atleast once. This query is formed using sub-queries. When I execute this query I get 93,801 rows in 3 seconds Select Id, Name, [Description] from tblProducts where Not Exists(Select * from tblProductSales where ProductId = tblProducts.Id) When I execute the below equivalent query, that uses joins, I get the exact same 93,801 rows in 3 seconds. Select tblProducts.Id, Name, [Description] from tblProducts left join tblProductSales on tblProducts.Id = tblProductSales.ProductId where tblProductSales.ProductId IS NULL In general joins work faster than sub-queries, but in reality it all depends on the execution plan that is generated by SQL Server. It does not matter how we have written the query, SQL Server will always transform it on an execution plan. If sql server generates the same plan from both queries, we will get the same result. I would say, rather than going by theory, turn on client statistics and execution plan to see the performance of each option, and then make a decision. In a later video session we will discuss about client statistics and execution plans in detail.
Views: 90108 kudvenkat
Webinar: Ten (Other) Top Tips for Improving PL/SQL Performance
 
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Bulk processing (FORALL and BULK COLLECT), along with the function result cache, are the "big ticket" items when it comes to performance optimization with PL/SQL. But there's still more we can do to tweak our code for even better response times for our users. This third webast in the series starts with the automatic compiler optimization, showcases the extraordinary speediness of PGA data manipulation (a.k.a., package variables), and demonstrates the effect of the simple NOCOPY hint. We finish up with an introduction to pipelined table functions and some thoughts on optimizing your algorithms.
Views: 10696 ODTUG
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: 519 OracleDBA
100500 способов кэширования в Oracle Database
 
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100500 способов кэширования в Oracle Database или как достичь максимальной скорости обработки запросов минимальной ценой. https://www.slideshare.net/AlexanderTokarev4/oracle-result-cache-deep-dive
Views: 359 Vint
Oracle Database 18c Express Edition Installation on Redhat Enterprise Linux 6.10
 
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In this video we are going to demonstrate how to install Oracle Database 18c Express Edition in Redhat Enterprise Linux 6.10. Oracle Database 18c Express Edition installation in RHEL 6 Platform is very easy. This video guides step by step installation of oracle 18c includes kernel parameters configuration, dependencies installation, oracle database installation, oracle listener configuration after installation and finally access oracle enterprise manager 18c in browser. Hardware Requirements : Minimum 2 GB RAM, 2 CPU Cores and Enough Hard disk Space. Software Requirements : Redhat Enterprise Linux 6 with dependencies for oracle database 18c installed and Kernel Parameters configured. Important Note: To avoid Port already in use error I will be configuring hostname at the end of installation. Installation method : Offline, Oracle Database 18c XE RPM file for linux downloaded and installed. Oracle Database 18c XE Features ############################### Oracle Multitenant - # of PDBs SQLJ Microsoft Distributed Transaction Coordinator support Native .NET Data Provider—ODP.NET .NET Stored Procedures Online index rebuild Online table organization Online table redefinition Trial recovery Fast-start fault recovery Flashback Table Flashback Database Cross-platform Backup and Recovery Sharded Queues Network Compression Client Side Query Cache Query Results Cache PL/SQL Function Result Cache Adaptive Execution Plans In-Memory Column Store In-Memory Aggregation Attribute Clustering Column-Level Encryption Tablespace Encryption Oracle Advanced Security Oracle Database Vault Oracle Label Security Centrally Managed Users Fine-grained auditing Privilege Analysis Real Application Security Redaction Transparent Sensitive Data Protection Virtual Private Database Oracle Spatial and Graph Property Graph and RDF Graph Technologies (RDF/OWL) Partitioned spatial indexes Oracle Partitioning Oracle Advanced Analytics Oracle Advanced Compression Advanced Index Compression Prefix Compression (also called Key Compression) Basic Table Compression Deferred Segment Creation Bitmapped index, bitmapped join index, and bitmap plan conversions Transportable tablespaces, including cross-platform and full transportable export and import Summary management—Materialized View Query Rewrite.
Views: 26 java frm
Oracle SQL Tuning - Equal SQL, Part 2 of 5 by John Watson, SkillBuilders.com
 
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Watch Oracle Master John Watson demonstrate why not all equivalent SQL statements are created equal. John demonstrates how SQL statements that produce equivalent result sets can have radically different response times, why this happens and common solutions. All five new video tutorials are available at SkillBuilders.com/Oracle-Tutorials 1. Introduction including the First Demonstration 2. SubQuery Factoring 3. Star Transformations 4. Aggregations 5. Summary Some experience analyzing Oracle execution plans is required to get the most from this tutorial.
Views: 6479 SkillBuilders
[en] SQL Developer- How to decrypt stored connections passwords in Oracle SQL Developer?
 
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Introducing the fastest way to decrypt SQL Developer stored connections passwords. Don't need any Java, Python or execute any scripts ! Vietnamese version: https://youtu.be/yrzsQ-Zf_ho
Views: 132 1Click2beDBA
Demonstrating Oracle DB Elapsed Time and Wall Time With Parallel Query
 
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Is it really true? In my recent postings I wrote that when using parallel query a SQL statement's wall time is roughly equal to its elapsed time divided by the number of parallel query slaves. To check I ran an experiment and posted the results. The results are both obvious and illuminating. If you don't want to read but just sit on the couch and watch a video, you're in luck! I created a special video clip demonstrating what I wrote about. The main video clip is from my OraPub Online Institute video seminar, Tuning Oracle Using An AWR Report - Part 1. (NOT Part 2 as the video shows) From my blog posting: http://blog.orapub.com/20140907/watch-oracle-database-elapsed-time-and-wall-time-with-parallel-query.html For more information on OraPub r for more great education, go to www.orapub.com
Views: 1215 OraPub, Inc.
The Optimum Histogram Utility DEMO 1 - Maximize Oracle Performance and SQL Execution Efficiency
 
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Demonstration of the influence of the Optimum Histogram utilities on the estimation accuracy of the Oracle Optimizer in a 11.2.0.1 Oracle Database. Tests highlight the increase in estimation accuracy on the optimizer and impact on execution plan selection. Tests conducted against a numeric column in a heap table and execution plan results and statistics captured to indicate impact on the optimizers execution plan selection of the OHU histograms. IMPORTANT NOTE: This utility is not a substitute for oracle's dbms_stats which calculates highly valuable statistics for oracle objects. It is an add on utility that can be used on columns with skewed distribution. Please see demonstration one for overview of architecture
Views: 4199 Doug Laughlin
What is Hard-Coding in PL/SQL?
 
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Practically Perfect PL/SQL with Steven Feuerstein See the first in a multi-video series that describes the nuances of hard-coding in PL/SQL. See the Practically Perfect PL/SQL YouTube channel for related videos. https://www.youtube.com/channel/UCpJpLMRm452kVcie3RpINPw 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.
Oracle Exadata Smart Scan - Limitations and Best Practices
 
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Smart Scan is a wonderful capability, but you don't always get it. It's impossible for many execution plans, and this is a major restriction. If you think about what a Smart Scan actually does, it delivers individual columns, individual rows back to the instance. Now, a buffer cache can accept only blocks. Therefore, Smart Scan cannot possibly put those columns of rows into the buffer cache. It's simply not formatted appropriately. So, a Smart Scan has to return values directly into the session's PGA or, to put it another way, the only access method that can use Smart Scan is direct read. Well, what access methods can use direct read? There are only two, which are table full scan and index fast full scan. Any other access method, typically index range scan, table access by row ID, cannot use a Smart Scan. The second major issue, there are strict limitations of the type of objects that can be accessed through Smart Scan. It really is only heap tables. You can't use indexes. You can't use clusters. You can't use IOTs. Heap tables only. Perhaps hardest to track down and giving sometimes very erratic results is that Smart Scan can be interrupted by various conditions. You've met all the requirements for Smart Scan, directory and so on, got the right execution plan. The Smart Scan starts and then hits something that causes a problem. Issues that we know cause problems are, for instance, read consistency, also delayed block cleanout, change rows. Any of those issues and a few others mean that the storage tier will have to interrupt its Smart Scan, deliver complete blocks into that buffer cache, let your session then do what is necessary to the block, and only then can the Smart Scan proceed. Now, in order to maximize the use of Smart Scan, there may be quite a lot of work. Very often, you'll have to adjust your index structures. Making them invisible is a nice technique there. There are many, many, many parameters that can influence the likelihood of achieving a Smart Scan, and almost inevitably you're going to be rewriting a lot of hint SQL and putting hints in it to get the correct execution plans that can enable a Smart Scan to occur. This is all because of one fundamental problem; the optimizer is not in any way aware of the Exadata. The optimizer develops an execution plan in exactly the way it would without the Exadata storage. The use of Smart Scan, the awareness of Exadata comes at the next level down. The optimizer develops the plan through a normal pass and then passes it through to the SQL execution engine, and it's the SQL execution engine that determines, on a case-by-case basis, whether to use the Smart Scan. This means that you might develop a plan and execute the statement 50 times. Forty-nine times, you get a Smart Scan. The 50th time, for whatever reason, the SQL execution engine decides not to. This can result in somewhat erratic performance.
Views: 1695 SkillBuilders
Oracle Database 12c - Row Limit (excerpt)
 
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Learn cool new SQL features in Oracle Database 12c. See more free 12c tutorials at SkillBuilders.com/12cTutorials
Views: 38111 SkillBuilders
Continuous Query Notification for the node-oracledb Driver
 
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Held in June 2018 Christopher Jones, Dan McGhan and Anthony Tuininga review some of the latest features of the node-oracledb Node.js driver and answer user's questions, and in particular offer an overview of the new APIs and demonstrate how they work. Native support for Oracle Database Continuous Query Notification (CQN) has landed in the node-oracledb master branch on GitHub. CQN allows an application to register queries with the database so the database can notify the application if the objects in the query or query result change. In this office hours, we'll provide an overview of the new APIs and demonstrate how they work. 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: 213 Oracle Developers
Oracle Coherence Tutorial: Clustered Cache Topologies -- Partitioned Cache | packtpub.com
 
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Part of 'Oracle Coherence Quickstart' video series. For the full Course visit: http://www.packtpub.com/oracle-coherence-quickstart/video?utm_source=youtube&utm_medium=video-description&utm_campaign=yt-oraclecohqu A Partitioned Cache can hold much more data than a replicated cache in a clustered environment. • Configure a distributed scheme in the cache configuration file • Test the distributed cache • Monitor the distributed cache via JMX ------------------------------------------------------------------------------------------------ For the latest in Big Data and Business Intelligence video tutorials, please visit: http://www.packtpub.com/books/video?utm_source=youtube&utm_medium=video-description&utm_campaign=yt-oraclecohqu Find us on Facebook -- http://www.facebook.com/Packtvideo Follow us on Twitter - http://www.twitter.com/packtvideo
Views: 766 Packt Video