1. Database must be running in archivelog mode.
2. There should not be any media failure.
3. If a control file has been restored or recreated during the time span you want to flashback over, then you can’t use the flashback feature.
4. You can’t flash back a database to before a reset logs operation.
5. You can’t flash back a data file that was shrunk or dropped during the time span covered by the flashback table operation.
Thanks
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