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单项选择题 What is the correct order of the following commands if you wanted to restore datafile 4, which was accidentally removed from the file system?()   a. sql ’alter database datafile 4 online’ b. restore datafile 4 c. recover datafile 4  d. sql ’alter database datafile 4 offline’ e. startup  f. shutdown

A、 a, c, b, d

B、 d, b, c, a

C、 f, d, b, c, a, e

D、 c, a, b, d, f

E、 a, b, d, e

  • B
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