By using Flashback version Query option you can get back all your prevously modified data.(i,e. u have applied "update" command many times in columns u can view all the updated data)
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By using Flashback version Query option you can get back all your prevously modified data.(i,e. u have applied "update" command many times in columns u can view all the updated data)
which performance tuning do u need?
There are different types of tuning mechanisms.
They are Database tuning,Memory tuning,Application tuning.