Examine this statement： RMAN >BACKUP FORMAT ’/BACKUP/df_%d_%s_%p.bus1 DATABASE filesperset = 2； What state must the target database be in for you to use this RMAN command？（）
- A、The target database must be open.
- B、The target database must be closed.
- C、The target database must be mounted.
- D、The target database must be mounted or open.
正确答案:D
答案解析:有
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