单选题

Why should you back up a duplicated tablespace after a TSPITR is complete?()  

A The tablespace cannot be duplicated or restored to any point in time after the duplication. 

B The tablespace cannot be duplicated or restored to the point in time before the duplication. 

C The entire database cannot be restored after a TSPITR, so a backup is required.

D You cannot bring the tablespace online until its been backed up.

E There is no requirement to do so, as RMAN will back up the tablespace after the TSPITR.

正确答案

来源:www.examk.com

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