【单项选择题】
Consider the recovery steps in each of the cases given below： <br /> Case 1： <br /> Shut down the database and perform a backup. <br /> Restore all the data files. <br /> Mount the database. <br /> Recover the database. <br /> Without applying all the redo log files， open the database using the RESETLOGS option. <br /> Back up the database. <br /> Case 2： <br /> Shut down the database and perform a backup. <br /> Restore only the data files of the tablespace where user error damaged the data. <br /> Mount the database. <br /> Recover the database. <br /> Open the database with&e
A、A.only case 1
B、B.only case 2
C、C.only case 3
D、D.case 1 and 2
E、E.case 2 and 3
F、F.case 1 and 3
H、G.all cases： case 1， case 2 and case 3
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