目前分類:Oracle in General (111)

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Oracle Session Control Shell Script (BASH)

session_control.sh

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Oracle 12c “In-Database Archiving” Practice


In-Database Archiving” in Oracle 12c allows particular rows to be marked for deletion instead of physically deleting the rows.

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Oracle 12c Data Redaction Example

Create a test sample data as follows:

SQL> conn sys@pdb1 as sysdba

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Manual Installation of Oracle 12c (12.1.0.2) Sample Schemas

Download linuxamd64_12c_examples.zip from:
http://www.oracle.com/technetwork/database/enterprise-edition/downloads/database12c-linux-download-2240591.html

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Oracle 12c In-Memory Table Practice
[oracle@testsvr admin]$ . oraenv
ORACLE_SID = [my12c] ?
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Plugin an Oracle 12c non-CDB database to an Oracle 12c Container Database (CDB)

PS. This non-CDB database is an Oracle 12g database upgraded from Oracle 11gR2 using DBUA (Database Upgrade Assistant) in the same machine.

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How to stop the Gather Stats Job in Oracle?

Answer:

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Create Oracle Jobs using DBMS_SCHEDULER Package
 

Privileges required for creating or managing job schedulers:

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Solving Number Data Type Display Issue (Scientific Notation) in PL/SQL Developer:

Issue:

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Oracle Useful Views for identifying Blocking Sessions

DBA_BLOCKERS display a session if it is not waiting for a locked object but is holding on an object for which another session is waiting.
In an Oracle RAC environment, this only applies if the blocker is on the same instance.

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Oracle 11g Flashback Data Archive (FDA) Know-how


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How to get last nanosecond of yesterday in Oracle?

Answer:

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Oracle Online Table Redefinition with DBMS_REDEFINITION package

Oracle Database allows to modify table structure online without affecting the table usages.


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Oracle Standard Index vs Reverse-key Index Comparison Testing

 

Reverse-Key Index:

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Comparison between different methods of conversion from TIMESTAMP to DATE

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-- Implicit Conversion

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Command to create an OCM (Oracle Configuration Manager) response file:

$ORACLE_HOME/OPatch/ocm/bin/emocmrsp -no_banner -output /backup/ocm.rsp

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Oracle Easy Connect Examples:

sqlnet.ora settings: (On Client Site)

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A very good article explaining the differences between  SQL Profile and SPM Baseline :
 http://intermediatesql.com/oracle/what-is-the-difference-between-sql-profile-and-spm-baseline/


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Issue:
Dropping a table encountered ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired

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Cause:
OraParameters are connected objects, and will cause sessions to remain in the database if not cleaned up properly.

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