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08 09 Demo   Invisible Indexes
 
04:04
ORACLE
Views: 193 oracle ocm
08 08 Invisible Indexes
 
03:27
ORACLE
Views: 129 oracle ocm
Oracle Pseudo Column, Virtual Column , Invisible Column and Unused Column
 
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More Details at, Pseudo Column @ https://www.youtube.com/edit?o=U&video_id=GIGmZwShGh4 Virtual Column @ https://www.youtube.com/edit?o=U&video_id=qUALFDzLDJw Invisible Column @ https://www.youtube.com/edit?o=U&video_id=nz48CdgDCt4 Unused Column @ https://www.youtube.com/edit?o=U&video_id=GWo4VcNZo6Y
Views: 252 Siva Academy
Invisible Indexes ( Excerpt from Oracle Tuning Video Tutorial) - Oracle 12c
 
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Oracle 12c Invisible Indexes is a feature , which is useful in oracle performance Tuning. This is an excerpt from "Oracle Performance Tuning Tutorial". [email protected] +91 9912323000 Oracle Performance Tuning Online Training : http://www.dbvidya.com/course/perform... Oracle SQL Performance Tuning Training Online : http://www.dbvidya.com/course/sql-tun... Oracle Performance Tuning Videos Tutorial for DBA and Developers : http://www.dbvidya.com/oracle-perform... Oracle AWR Tutorial: http://www.dbvidya.com/course/oracle-... Erwin Tool Online Training : http://www.dbvidya.com/course/erwin-t... ER Data Modeling Course : http://www.dbvidya.com/course/er-mode... Dimensional Modeling Training Online : http://www.dbvidya.com/course/dimensi... Oracle Database Blogs : http://www.dbvidya.com/blog/
Views: 22 DbVidya
Multiple Indexes on the Same Set of Columns
 
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This video demonstrates how you can use invisible indexes to allow multiple indexes on the same set of columns. Multiple indexes on the same column set is a new feature in Oracle 12c. For more information see: https://oracle-base.com/articles/12c/multiple-indexes-on-same-set-of-columns-12cr1 Website: https://oracle-base.com Blog: https://oracle-base.com/blog Twitter: https://twitter.com/oraclebase Cameo by Scott Spendolini Blog: http://spendolini.blogspot.co.uk/ Twitter: https://twitter.com/sspendol Website: http://www.sumnertech.com/ Cameo appearances are for fun, not an endorsement of the content of this video.
Views: 1408 ORACLE-BASE.com
Unusable vs Invisible index   - Oracle 12c
 
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Difference between Unusable and invisible index wrt Oracle 12c. +91 991 2323 000 [email protected] Oracle SQL Performance Tuning Training Online : http://www.dbvidya.com/course/sql-tuning-advanced/ http://www.dbvidya.com/course/performance-tuning-for-dba/ Oracle Performance Tuning Online Training : http://www.dbvidya.com/course/perform... http://www.dbvidya.com/course/dimensional-modeling/ Oracle Performance Tuning Videos Tutorial for DBA and Developers : http://www.dbvidya.com/oracle-perform... Oracle AWR Tutorial: http://www.dbvidya.com/course/oracle-... Erwin Tool Online Training : http://www.dbvidya.com/course/erwin-t... ER Data Modeling Course : http://www.dbvidya.com/course/er-mode... Dimensional Modeling Training Online : http://www.dbvidya.com/course/dimensi... Oracle Database Blogs : http://www.dbvidya.com/blog/
Views: 58 DbVidya
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: 327 Connor McDonald
SQL 12c Tutorial 20 : SQL 12c Creating Multiple Indexes on column
 
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SQL 12c Tutorial 20 : SQL 12c Creating Multiple Indexes on column SQL 12c New Features SQL 12c Tutorial for beginners Oracle 12c Tutorial for beginners Creating Multiple indexes on column
Views: 1021 TechLake
Oracle 12c R2 Improvements to the Index Usage Tracking Feature
 
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Oracle 12c R2 adds some nice improvements to its index usage tracking feature. With these improvements, it is now easy to find out how many accesses the indexes have received, how many rows have been returned and the most recent time that the index was used. In this webinar OCP DBA John Mullins will explain and demonstrate the behavior changes, enhancements and usage of this feature. This webinar is a subset of the 4 day Oracle Database Performance Tuning course and the 3 day Oracle SQL Optimization for Developers course offered by Themis. This presentation is meant for Oracle development staff and database administrators. It is delivered by Themis instructor John Mullins.
Views: 199 Themis Education
SQL 12c  Tutorial 18 : SQL  Invisible Column options in SQL 12c New Features
 
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SQL 12c Tutorial 18 : SQL Invisible Column options in SQL 12c New Features SQL 12c Tutorial for beginners Oracle SQL 12c Tutorial for beginners Oracle SQL 12c New Features
Views: 758 TechLake
AskTOM TV - Partial indexing
 
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A video to help you understand the "thought process" behind answering AskTom questions. In this episode, we look at enforcing uniqueness in a table, but only for a subset of the rows blog: https://connor-mcdonald.com
Views: 423 Connor McDonald
SQL 12c  Tutorial 21 : SQL 12c Features APPROX_COUNT_DISTINCT
 
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SQL 12c Tutorial 21 : SQL 12c Features APPROX_COUNT_DISTINCT for COUNT & DISTINCT Combination SQL 12c Tutorial for beginners Oracle SQL 12c Tutorial for beginners APPROX_COUNT_DISTINCT for COUNT and DISTINCT
Views: 1089 TechLake
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: 3548 SkillBuilders
09 03 Indexing Costs and Overhead
 
04:40
ORACLE
Views: 21 oracle ocm
002 Virtual Columns
 
05:27
Views: 661 Kartik Mundhra
07 04 Index Column Order Matters
 
04:53
ORACLE
Views: 107 oracle ocm
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: 2692 Tech Coach
Oracle Invisible Column
 
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Oracle 12c new feature - Invisible column https://easy-learning-tech.blogspot.com/2018/05/invisible-column-from-oracle-12c.html oracle 12c new features for developers
Views: 191 Siva Academy
Oracle New feature 12c  - Multiple Index on same column in oracle
 
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Oracle New feature 12c - Multiple Index on same column in oracle
Views: 223 Siva Academy
SQL 12c Tutorial 22 : SQL 12c Feature TRUNCATE TABLE With CASCADE option
 
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SQL 12c Tutorial 22 : SQL 12c Feature TRUNCATE TABLE With CASCADE option SQL 12c New Features SQL 12c Tutorial for beginners Oracle SQL 12c Tutorial for beginners
Views: 925 TechLake
SQL Magic Trick: Invisible Columns  with Chris Saxon
 
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So many new features in Oracle Database 12c allow DBAs and Developers to work magic... Watch this SQL Magic Trick with Chris Saxon, Oracle SQL Developer advocate and member of the AskTOM team
Views: 206 Oracle Developers
SQL Magic: Dynamic Pivot, Polymorphic Table Functions and More
 
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In October's session, Chris Saxon covered SQL magic, including the following highlights: - 0:50 - how to find table name for index (sub)partitons from *_ind_(sub)partitions - 2:00 - SQL Magic! the dynamic pivot update; converting rows & columns in a table via an update statement - 8:30 - Polymorphic table functions; the describe function & fetch_rows procedure; PTFs and the optimizer; examples on LiveSQL.oracle.com. 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. Music by bensound.com 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 by bensound.com
Views: 446 Oracle Developers
Oracle Tutorial - How to add virtual column in oracle 11g
 
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Hello friends in this video i'm going to demonstrate you how to add virtual column in ORACLE 11g step by step. Oracle 11g supports virtual columns which are derived from the other columns in the table. You can use the virtual columns in your queries, you can index them, you can collect the statistics, etc. There are few restrictions on the virtual columns. You cannot write/insert the data into virtual columns. There is no support for index_organized, external, object, cluster, temporary tables.
Views: 1428 OCP Technology
SQL 12c  Tutorial 19 : SQL  IDENTITY Column for generating Sequence Values by default
 
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SQL 12c Tutorial 19 : SQL IDENTITY Column for generating Sequence Values by default SQL 12c Tutorial for beginners Oracle SQL 12c Tutorial for beginners SQL 12c New Features Identity columns
Views: 1157 TechLake
오라클 힌트 강좌 #16 : Oracle11g Invisible Indexes use_invisible_indexes 힌트, no_use_invisible_indexes 힌트
 
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오라클 힌트 강좌 #16 : Oracle11g Invisible Indexes use_invisible_indexes 힌트, no_use_invisible_indexes 힌트
Views: 52 이종철
Oracle Core,  Лекция 4
 
43:44
Ссылка на файл с презентацией: https://docs.google.com/presentation/d/1hqsC6hEGybAbEEPko56razF7eLBJQEZ3L-ECWtp7rbM/edit?usp=sharing (презентация может быть с анимацией) Ссылка на краткий конспект лекции:https://docs.google.com/document/d/1UFayi0YIXxLrRuj4-JZj-jooyvpoa4rKLOryBloTtag/edit?usp=sharing 1. Create table: permanent tables, temporary tables (on commit delete/preserve rows) 2. Physical properties таблицы: tablespace, logging, pctfree, pctused, initrans 3. Pctfree и pctused 4. Initrans и maxtrans 5.Storage clause: initial, next, minextents, maxextents, pctincrease, freelists, freelist groups, optimal, buffer_pool (keep,recycle), flash_cache (keep, none), encrypt 6. Table properties: column_properties, cache, result_cache, enable_disable_clause, flashback_archive_clause 7. Alter table: column_clause, constraint_clause, alter_table_partitioning, move_table_clause, enable_disable_clause, rename to, shrink space 8. High water mark. Low high water mark 9. Create index: table index clause, index_expr, index_properties, unusable 10. Reverse indexes 11. Function based indexes 12. Alter index: сжатие (shrink space), параллелизм, физические атрибуты (pctfree, pctused, initrans), logging/nologging, rebuild, enable/disable, unusable, visible/invisible, rename to 13. Индекс по внешнему ключу 14. Причины неиспользования индексов 15. Оператор truncate 16. Неявный commit при выполнении ddl 17. Словари данных Oracle Database, БД Oracle, вебинар Oracle, презентация Oracle, урок Oracle, лекция Oracle, обучение Oracle
Oracle Database 12cR2 New Features
 
02:21
My latest book on Oracle Database 12c Release 2 New Features. A stunningly read chapter excerpt on the new index monitoring features.
Oracle Pseudo columns
 
04:01
pseudo columns in oracle
Views: 316 Siva Academy
SQL 12c Tutorial 23 : SQL Creating PARTITION on  Existing Table SQL 12c new feature
 
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SQL 12c Tutorial 23 : SQL Creating PARTITION on Existing Table SQL 12c new feature SQL 12c New Features SQL 12c Tutorial for beginners Oracle SQL Tutorial for beginners Creating Partition on existing table
Views: 1474 TechLake
09 09 Index not Selective Enough
 
01:30
ORACLE
Views: 26 oracle ocm
Oracle tutorial : What is Virtual column in Oracle PL SQL
 
06:54
This video will show you " Oracle tutorial: What is Virtual column in Oracle PL SQL " sql calculated field computed column oracle-11g-new-feature-virtual-column Oracle tutorial : What is Virtual column in oracle Syntax : column_name [datatype] [GENERATED ALWAYS] AS [expression] [VIRTUAL] 1)The values of the virtual column are not stored in the database. 2)You can not update the values of virtual column. 3)when you try to modify it will give oracle error. 4)These are read only values. 5)Virtual columns used in the WHERE clause of UPDATE and DELETE statement 6)Constraints can be created on them. #techquerypond https://techquerypond.wordpress.com https://twitter.com/techquerypond
Views: 1515 Tech Query Pond
Read-Only Tables in Oracle
 
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Here's a quick video showing how to create Read-Only tables in Oracle. For more information see: https://oracle-base.com/articles/11g/read-only-tables-11gr1 Website: https://oracle-base.com Blog: https://oracle-base.com/blog Twitter: https://twitter.com/oraclebase Cameo by David Peake Blog: http://dpeake.blogspot.com/ Twitter: https://twitter.com/orcl_dpeake Cameo appearances are for fun, not an endorsement of the content of this video.
Views: 922 ORACLE-BASE.com
Oracle 12C New Feature Listagg function improvements
 
09:56
oracle 12c new features Queries used in the video are given in the blog link http://easy-learning-tech.blogspot.in/2018/04/oracle-12c-new-feature-listagg-function.html oracle 12c new features for developers
Views: 1286 Siva Academy
Oracle Database 11g New Features in PLSQL Release 1 Presentation Video Oracle DB
 
06:27
For a quick reference on oracle visit http://PocketORACLE.blogspot.com
Views: 3147 TheEzguide
06 04 Index Lookup Operations
 
08:37
ORACLE
Views: 44 oracle ocm
ORACLE 12C COURSE / Oracle Database 12C /Oracle 12c new features
 
45:59
Oracle 12c course complete hare you can solve the sql in Oracle Database .Database is free course hare and you get all the features and find the latest update and Oracle is multi american company and get the latest the course .Oracle Database 12C
Views: 278 Education
PL/SQL Tutorial: Differences Between PLS_INTEGER and BINARY_INTEGER
 
07:25
Differences Between PLS_INTEGER and BINARY_INTEGER 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: 673 TechLake
09 02 What Should I Index
 
06:54
ORACLE
Views: 39 oracle ocm
Why Oracle Multitenant
 
01:04
Customers discuss some of the cool new Multitenant features of Oracle Database 12c on Oracle Cloud
Chris Saxon on Tuning Your SQL Queries
 
09:17
Alexa Morales, Director of Developer Content for Oracle, interviews Chris Saxon at Oracle OpenWorld Europe in London on January 17, 2019.
Views: 150 Oracle Developers
Oracle 12c PL/SQL Security Features - Lesson 4 of 8 - Roles and PLSQL
 
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Learn how Roles really work with Oracle PL/SQL and why a privilege granted via a role can't be used in PL/SQL. Demonstrations, examples. See all lessons and many more free Oracle Database tutorials at https://www.skillbuilders.com/free-oracle-database-tutorials John Watson: We have the business of roles - roles and PL/SQL. The point here is that roles are invisible to PL/SQL. When you compile your code, only direct privileges are available. When you run your code, only direct privileges are available. This is for definer's rights, I should say. When you run the code, only direct privileges are available to grant to the definer. In effect, the definer's rights code, all roles are disabled within the stored procedure. And certainly roles are disabled when compiling the code. Functionally, it's equivalent to having issued the command SET ROLE NONE. Why is this? Why is it you can't use your privileges? It's perfectly straightforward. It's a technology limitation. Quickly to see what's going on. If I go in and say - let me connect or create a clear schema. I'll create myself, grant dba to jw identified by jw. I've created a user and given him ridiculously high privileges. Connect.... What can you do? You can do pretty much anything. If he wants to delete from scott.emp, he can do it. Let's roll back, because along with his dba role, he has the ability to pretty much anything to use the data. Now we'll create a procedure. If I create a procedure, create delemp as begin, and in there I delete from scott.emp, end, compilation errors. What are they? Show error. At line 2 table of view doesn't exist. That's line 2 delete from scott.emp. I remember way back in version 7, this cause so much confusion before we realized what was going on. It's quite simple that when we are within the code, as the definer or the invoker, because this is definer's rights code, when we are within the definer's rights code block or indeed when we are compiling a definer's rights code block, the roles are disabled and that's why we cannot see it. But why is this and why do I say it's a technology limitation? It's because roles can be enabled and disabled. They can be enabled or disabled. That makes it logically impossible to consider a role when executing a stored procedure because I might have the role enabled while I compile it, but how do I know that it's going to be enabled when I run it? If I grant execute on the code to a third party, he doesn't have the role at all and that he must not even be logged on. So it becomes a logical impossibility because of the way roles are used because roles are enabled or disabled. You can dynamically switch them on and off. It's a logical impossibility to use role within definer's rights program module. Invoker's rights code, however, is very different. That infuses some interesting issues. Invoker's rights code can use any roles that happen to be enabled for the user at the time that he invokes it in exactly the same way that an anonymous PL/SQL can use any enabled roles. In the security point of view, the definer can in effect grab any roles within his code that the invoker happens to have. Dave: [Question], John, pardon. How do you enable or disable a role? John: Right now there's several techniques. I won't spend too much time demonstrating. The easiest technique will be alter - I can set role none. And that will have disabled all my roles. Now if you look at this, I've got nothing. If I try to run my code and query - let's see. Yes. If I try to delete from scott.emp I can't see it. So I'll set role dba and now of course I can. That's the easiest way. In fact, there are much more [05:07 inaudible] ways to switch roles on and off. We can do it with operating system authentication and I can do it with proxy authentication. We have a persistent session through application server as well as a user when we pass that session out to many of the users that can switch roles on and off. That's the persistent session switch identities. Perhaps, best of all, I can create what I call secure application roles well it protect the role with a package and that can contest any number of issues - environment variables, maybe the time, maybe your IP address, perhaps the program you're using and switch roles on and off accordingly. So there are many ways for controlling roles and you should do it. Blindly granting roles and letting them be enabled all the time is not good security. The end result for this, however, you can get some pretty unexpected results within your code. I've tried to run through in our first half hour some of the issues that we see with PL/SQL in release 11g and earlier. After a short break, we'll move on to the 12c features.
Views: 297 SkillBuilders
2MTT: Extended Data Types | Roopesh Roomklas
 
02:32
Pythian consultant and "OCA Oracle Database 12c SQL Fundamentals I Exam Guide" author Roopesh Roomklass focuses his tip on extended data types in Oracle Database 12c. Roopesh's tip is based on "An Introduction to Extended Data Types in Oracle 12c," a post on his Pythian blog: http://www.pythian.com/blog/an-introduction-to-extended-data-types-in-oracle-12c/
Views: 163 ArchBeat Archive
SQL 12c Tutorial 7 : SQL 12c ROW Limiting Clause
 
06:40
SQL 12c Tutorial 7 : SQL 12c ROW Limiting Clause SQL 12c Tutorial SQL Tutorial for beginners Oracle SQL Tutorial for Beginners
Views: 513 TechLake

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