Flashback Database

Flashback Database: A Primer

Oracle 10g’s brilliant alternative to database point in time recovery is the the Flashback Database feature. With this feature in place you can do almost everything that you can with point in time recovery, without actually having to go through all the disruptions and hassle that a PITR necessarily entails.

How to enable Flashback in oracle database 11g
Note:
From 11GR2 we donot have to bounce the database to alter flashback.