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多項選擇題

You have a database with the following tablespaces: SYSTEM, SYSAUX, UNDO, USERS, TEMP. You want to"roll back" the data in the USERS tablespace to the way it looked yesterday. 
Which tablespaces do you need to perform a point-in-time restore operation on in order to complete this task?() 

A. SYSTEM
B. SYSAUX
C. UNDO
D. USERS
E. TEMP
F. This restore is not possible

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