Limitation of Flashback Database.

The Flashback Database allows you to get back the entire database to a specific point-in-time.
It is best used as a replacement for incomplete recovery of a complete database. The main benefit of the Oracle Flashback Database over incomplete database recovery is that the Flashback Database is much quicker and more efficient. The Flashback Database is based on flashback logs.

It has some limitations such as,

•Flashback Database can only undo changes to a datafile made by an Oracle database. If any media failure occurs in database then flashback database can't be used. That means if a datafile is dropped then we can't use flashback feature.

•If you have shrink your any datafile then flashback database can't be used.

•If the database control file is restored from backup or re-created, then you cannot use FLASHBACK DATABASE to return to a point in time before the restore or re-creation of a control file.

•If you get back to a time by flashback database when nologging operation was running then it is likely happen block corruption on database.