单选题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. shutdownA a， c， b， dB d， b， c， aC f， d， b， c， a， eD c， a， b， d， fE a， b， d， e
单选题
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
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