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Before a Flashback Table operation, you execute the following command: ALTER TABLE employees ENABLE ROW MOVEMENT; Why would you need this to be executed?（）
A:Because row IDs may change during the flashback operation
B:Because the object number changes after the flashback operation
C:Because the rows are retrieved from the recycle bin during the flashback operation
D:Because the table is moved forward and back to a temporary during the flashback operation

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出自：Oracle认证

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