You are maintaining your database in Oracle10g. You are performing the backup by using the BACKUP AS BACKUPSET command at the RMAN prompt. Which file cannot be backed up by using the BACKUP AS BACKUPSET command？（）
- A、Datafiles
- B、 Current control file
- C、 Server parameter file （spfile）
- D、 Password file
正确答案:D
答案解析:有
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