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单选题
By mistake, you ran the batch job (for updating the BILL_DETAILS table) twice. You are not sure which rows in the BILL_DETAILS table were affected. You need to identify:  a) A list of changes made along with the transaction identifier of each change.  b) The necessary SQL statements to undo the erroneous changes.  Which option would you choose?()
A

 RMAN only.

B

 Flashback Table only.

C

 Flashback Version Query only.

D

 Flashback Database and Flashback Transaction Query.

E

 Flashback Version Query and Flashback Transaction Query.


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