Topic: Performance & Tuning >> SCN
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| jothi |
Posted: Nov 27, 2007 09:31:08 AM |
Total Post: 24
Joined: Aug, 2007
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hi,
can anyone tell me about SCN |
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 Mohammed Taj |
| Posted: Nov 27, 2007 09:52:00 AM |  |
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Total Post: 694
Joined: Jul, 2007
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system change number (SCN)
A stamp that defines a committed version of a database at a point in time. Oracle assigns every committed transaction a unique SCN.
http://www.oracle.com/pls/db10g/search?remark=quick_search&word=scn
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| positive |
| Posted: Jun 27, 2008 06:19:26 PM | |
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Total Post: 361
Joined: Jun, 2008
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The state of a database is determined by SCN.State changes after dml like insert,update,delete.System doesnt change in case of select statement.
Control file has the SCN entry.
SCN is vital while recovering database.
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