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In which scenario do you use the Flashback Database feature？（）
A: when a table is dropped and you restore it from the Recycle Bin
B: when a user’s schema is dropped and you recover the user’s schema
C: when some incorrect data is inserted in the table and you retrieve the table to a state that was at a certain timestamp
D: when a row of a table is updated frequently and committed， and you view all the versions of the row within a specific duration

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出自：Oracle认证

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