Flashback

Oracle DBMS_FLASHBACK Enable At Time: Session Flashback Guide Oracle's DBMS_FLASHBACK.ENABLE_AT_TIME is a powerful procedure that lets you travel back in time within your database session — letting you query data exactly as it existed at a specific past moment, without needing a full database restore. What This Code …

Overview When working with Oracle Database, there are times when you need to look at data from the past — like rewinding a video to see what happened earlier. Oracle gives you a tool called Flashback to do this. But once you are done looking at past data, you must turn Flashback off. The command to do that is: 1EXEC …

Export an Oracle Database from a Point in Time Using FLASHBACK_TIME The Oracle exp utility supports a FLASHBACK_TIME parameter that lets a database administrator export a full database with all data consistent to a single point in time. This is critical for large, active databases where export duration may span minutes …

How to Find the Current SCN in Oracle Database Using DBMS_FLASHBACK What number marks "now" inside an Oracle database? The System Change Number (SCN) does. One call to DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER returns it from any session that has EXECUTE on the package. What Is an SCN? The System Change Number (SCN) is a …

Oracle Fast Recovery Area: Set DB Recovery File Dest and Size Purpose The Oracle Fast Recovery Area (FRA) is a disk location where Oracle keeps files related to backup and recovery. Two dynamic initialization parameters, db_recovery_file_dest and db_recovery_file_dest_size, control its location and its disk quota. …

Set Oracle Flashback Database Retention Target with ALTER SYSTEM Oracle Flashback Database lets you rewind your entire database to a past point in time without a full restore. The command ALTER SYSTEM SET DB_FLASHBACK_RETENTION_TARGET controls how far back in time that rewind can go. What This Command Does The …

How to Enable Oracle Database Flashback: Shutdown, Mount, and ALTER Commands Oracle Flashback Database is one of the most powerful data protection tools available to a DBA. This guide walks you through the four commands needed to turn on Oracle Flashback — from a clean shutdown to opening the database in flashback …