A user performs an update on a table. Shortly after committing the transaction, they realize that they
had an error in their WHERE clause causing the wrong rows to be updated. Which Flashback option
would allow you to undo this transaction and restore the table to its previous state?
A. Flashback Drop
B. Flashback Query
C. Flashback Versions Query
D. Flashback Transaction Query
E. Flashback Table
Only the Flashback Table options recovers a table to previous point in time.The other
options allow viewing of past states of the data(B,C,D)or restoration from the Recycle
Bin(A),but they do not recover a table to a previous point in time.
原文：http://www.cnblogs.com/Babylon/p/7794514.html