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單項(xiàng)選擇題

Which method would you use to undo the changes made by a particular transaction without affecting the changes made by other transactions?()

A. point-in-time recovery
B. execute the ROLLBACK command with transaction number
C. flashback the database to before the transaction was committed
D. determine all the necessary undo SQL statements from FLASHBACK_TRANSACTION_QUERY and use them for recovery

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