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A Poll on the usage of SQL Plan Management
Dominic Brooks has put up a poll on the usage of SQL Plan Management. If you have used it or tested it, please contribute. Your comments would be useful.Note : In all honesty, I haven't used it...
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RMAN Tips -- 4
Here I have backups that go backup more then 4 months :RMAN> list backup summary;List of Backups===============Key TY LV S Device Type Completion Time #Pieces #Copies Compressed Tag------- -- -- -...
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Index Block Splits
Here are some blog posts about Index Block Splits that I had done earlier :Index Block Splits : 90-10 (17-May-09)Index Block Splits : 50-50 (23-May-09)Index Block Splits and REBUILD (26-May-09)Index...
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CURRENT_SCN and CHECKPOINT_CHANGE#
The V$DATABASE view provides the current SCN at the database level.The V$DATAFILE view provides the SCN at which the last checkpoint was issued for each datafile.For example :SQL> select current_scn...
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CHECKPOINT_CHANGE#
In my previous post CURRENT_SCN and CHECKPOINT_CHANGE#, I had asked : "In which scenarios could the checkpoint_change# value differ between V$DATAFILE and V$DATAFILE_HEADER ?" Here's a little demo...
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SQL written by Lisbeth Salander
A review of the SQL that Lisbeth Salander [in the movie "The Girl With The Dragon Tattoo"] writes....
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Java for PLSQL Developers
An introduction to Java for PLSQL developers by Lucas Jellema....
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OEM 12c : New Book
PACKT will be releasing a new book by Porus Homi Havewala : "Oracle Enterprise Manager 12c Cloud Control : Managing Data Centre Chaos". It is currently available as a Pre-Order....
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RMAN BACKUP AS COPY
By default the BACKUP command in RMAN creates BackupSet(s) -- each of which is one or more BackupPiece(s). A datafile may span BackupPieces but may not span a BackupSet.However, RMAN does allow...
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CONTROLFILE AUTOBACKUPs are OBSOLETE[d]
There was a recent forums discussion about manual controlfile backups being obsolete. Here I show that even autobackups are obsoleted by Oracle.First I show that CONTROLFILE AUTOBACKUP is ON an...
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An Oracle Installer that automatically switches to Console mode
The WebLogic installer can switch automatically to console mode.UPDATE : However, quickstart.sh still requires an X-display as I discovered after the install completed.-sh-3.2$ echo...
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WizIQ Tutorials
In the past two years I had published a few tutorials. These are on WizIQ. I plan to publish a few more this year....
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Materialized View Refresh ON COMMIT
A quick demonstration of a Materialized View that is refreshed ON COMMIT.NOTE : This blog post has been updated after Yuri pointed out an error.SQL> create table source_table 2 as select rownum as...
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ON COMMIT Refresh without a Primary Key
Today's question : How can you build an ON COMMIT Refresh Materialized View for a table that has no Primary Key ?...
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Database Specialists in Singapore
Visit Database Specialists --- my new "commercial" site....
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How to use Oracle Virtual Box templates
An article : How to Use Oracle VM VirtualBox Templates...Published with Blogger-droid v2.0.6
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Issue a RECOVER for a Tablespace/Datafile that does not need recovery
Today's Question : What happens if you issue an RMAN RECOVER for a Tablespace or Datafile that is current and does not need recovery ?Notice the smart "recover if needed" that is executed ?RMAN>...
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Storage Allocation
Here's a quick demo to show how specifying STORAGE parameters can affect the actual allocation.Connected to:Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - ProductionWith the Partitioning,...
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