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Database - Managing Databases with Oracle - Discussion

Discussion Forum : Managing Databases with Oracle - General Questions (Q.No. 18)
Managing Databases with Oracle
18.
An Oracle System Change Number (SCN):
is a value that is incremented whenever a dirty read occurs.
is incremented whenever a deadlock occurs.
is a value that keeps track of explicit locks.
is a value that is incremented whenever database changes are made.
Answer: Option
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