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Categories / Oracle PLSQL Tutorial / Transaction

 

Query Flashbacks

If you mistakenly commit changes and you want to view rows as they originally were, you can use a query flashback. You can then use the results of a query flashback to manually change rows back to their original values if you need to. In addition, flashbacks can be based on a datetime or system change number (SCN). The database uses SCNs to track changes made to data, and you can use them to flash back to a particular SCN in the database.