Flashback Query Privilege

http://www.oracle-base.com/articles/10g/Flashback10g.php

You must have either the FLASHBACK ANY TABLE system privilege or have FLASHBACK object privilege on the table. 
You must have SELECT, INSERT, DELETE, and ALTER privileges on the table. 
There must be enough information in the undo tablespace to complete the operation. 
Row movement must be enabled on the table (ALTER TABLE tablename ENABLE ROW MOVEMENT;).
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