Flashback

Enable flashback

exec dbms_flashback.enable;

Disable flashback

exec dbms_flashback.disable;

To put the session back in time

Note: undo_management must be auto Note: Take a look at undo_retention to get an idea of how far back you might be able to go.

exec dbms_flashback.enable_at_time(to_date('2012-AUG-24 12:00:00', 'YYYY-MON-DD HH24:MI:SS'));