UNDO_RETENTION

Explaining the ORA-1555 Error: Causes, Solutions, and Prevention

If you operate an Oracle database, you may have experienced the headache of the "ORA-1555: snapshot too old" error. This...

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What is Oracle UNDO? Complete Explanation with Diagrams: Mechanism, Purpose, and Usage Monitoring

UNDO is a vital mechanism in Oracle Database that allows for transaction rollback, read consistency, and flashback opera...

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