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单项选择题The data file belonging to theSYSTEMtablespaceis corrupted and no backup of the file is available. How do you recover the data file？（）

A、The data file cannot be recovered.

B、The date file can be restored from theSYSTEMauto backup.

C、Take thetablespaceoffline，drop，kand re-create it.

D、Recovery Manager （RMAN） is used to recover the data file.

E、The ALTER DATABSE CREATE DATAFILE..commandis used to recover the data file.

  • A

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