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Open Invitation from Packt Publishing
Packt is celebrating a milestone with an Open Invitation....
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IT Contracting in Singapore
Do you agree with this blog post on the Singapore IT Contract market ?...
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Cardinality Decay
There was a forums question on Cardinality decay when a desired value is beyond the MAX value in a column.Here is a quick demo in 11.2.0.1:SQL> drop table test_cardinality purge;Table...
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Separate Child Cursor with varying bind allocation length
Although usage of bind variables can mean that the SQL statement does not need to be re-parsed at every execution, if the length of the bind changes, Oracle may create a seperate child cursor.For...
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Oracle 11g Anti-Hackers Cookbook
PACKT has published a new Oracle Security book called the "Oracle 11g Anti-hacker's Cookbook" , written by Adrian Neagu. They have kindly sent me a copy of the book which I shall be reviewing over the...
View ArticleBook on OEM 12c
My friend and former ACE Director Porus Homi Havewala's new book on Oracle Enterprise Manager 12c Cloud Control, is now available. This is the first published EM 12c Cloud Control book in the world.If...
View ArticleOracle's Advisory On Certification Integrity
Those interested in Oracle Certification : Take note ! Certification Integrity and Cheating (Oracle Certification)...
View ArticlePodcast on the Oracle ACE program
The OTN Archbeat is putting up podcasts on the Oracle ACE program. Podcast Show Notes: ACE in the Whole -- An inside look at the Oracle ACE program (ArchBeat)
View ArticleOracle 11g Anti-Hackers Cookbook
As I mentioned in my earlier post, PACKT Publishing had sent me a copy of the Oracle 11g Anti-Hacker's Cookbook for review.I like the book as an introduction to the various techniques that can be used...
View ArticleBackup and Recovery with intermediate NOARCHIVELOG
In a recent forums post, there was a question about whether one can taken an L0 backup, then switch the database to NOARCHIVELOG mode for transactions, switch back to ARCHIVELOG mode and take an L1...
View ArticleMoving a Partition to an Archival Schema and Tablespace
Here is a demo of moving a partition of the BALANCES table in the BALANCES schema to a separate Schema (ARCH), Tablespace (ARCHIVAL) and Table (BALANCES_ARCH).SQL> connect...
View ArticleShort-Circuiting the COST
The Oracle Optimizer can be smart when evaluating predicates in a query.If it finds a predicate that causes a "short-circuit" --- one that prevents rows from being returned by the query --- it can...
View ArticleSegment Size of a Partition (11.2.0.2 and above)
In 11.2.0.2, Oracle introduced a change to the default size of Partition Segment.According to Support Note "Initial Extent Size of a Partition Changed To 8MB From 64KB After Upgrade to 11.2.0.2 [ID...
View ArticleUseful Oracle Youtube videos
This will be a periodically updated list of useful Oracle Youtube videos.17-Mar-13 Jonathan Lewis -- Pessimist Exadata17-Mar-13 Connor McDonald -- RAC Upgrade Nightmare...
View ArticleOracle Forums due for Upgrade
forums.oracle.com will be undergoing an upgrade in a few days.This is the announcement.This is the discussion thread. (requires login to forums.oracle.com)...
View ArticleSingle Row Fetch from a LOB
When dealing with a LOB column, Oracle does not use array fetches but always does a single-row fetch.For example, for a CLOB, one row may have a 20-character string but the next row may have a 2billion...
View ArticleSSD Performance for Oracle Databases
A link to a post by Gwen (Chen) Shapira on SSD Performance for Oracle Databases....
View ArticlePreparing for Oracle Certification
Links to useful information on preparing for Oracle Certification.1. Youtube "HOW TO : Preparing For Your Oracle Certification" by OracleCertification2. Youtube "Oracle Certification Practice Exams"...
View ArticleBACKUP CURRENT CONTROLFILE creates a Snapshot Controlfile
A short post today.Recently, there was a discussion on forums about when a Snapshot controlfile is created. It is known that the snapshot controlfile is created to re-synchronise with the Catalog.But...
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