题目内容

Which of the following represents the correct way to perform an online recovery of datafile 4, which is assigned to a tablespace called USERS?()

A. shutdown restore datafile 4; recover datafile 4; alter database open;
B. Sql alter database datafile 4 offline; restore datafile 4; recover datafile 4; alter database open;
C. Sql alter database datafile 4 offline; restore datafile 4; Sql alter database datafile 4 online;
D. Sql alter database datafile 4 offline; restore database datafile 4; recover database datafile 4;Sql alter database datafile 4 online;
E. Sql alter database datafile 4 offline; restore datafile 4; recover datafile 4; Sql alter database datafile 4 online;

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