Oracle Database - Recovery

Card Puncher Data Processing

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Oracle Database also uses SCNs as part of its instance recovery and media recovery mechanisms.





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Card Puncher Data Processing
Oracle Database - System Change Numbers (SCNs) - Point in time

A system change number (SCN) is a logical, internal time stamp used by Oracle Database. SCNs order events that occur within the database, which is necessary to satisfy the ACID properties of a transaction....



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