单项选择题

Whatistheimpactoftheresultsoftheoutputofthefollowingcommand？（）RMAN>reportunrecoverabledatabase；ReportoffilesthatneedbackupduetounrecoverableoperationsFileTypeofBackupRequiredName4fullorincrementalC：/ORACLE/ORADATA/ORCL/USERS01.DBF
A.Therearenobackupsetswithanybackupsoftheusers01.dbfdatafile.
B.Theusers01.dbfdatafilehashadunrecoverableoperationsoccurinit.Itwillneedtobebackeduporsomedatalossispossibleduringarecovery.
C.Theusers01.dbfdatafileiscorrupted.
D.Theusers01.dbfdatafilebackupexceedstheretentioncriteria.
E.Thelastbackupoftheusers01.dbfdatafilefailedandmustbererun.

A.DBF
A.Therearenobackupsetswithanybackupsoftheusers01.dbfdatafile.
B.Theusers01.dbfdatafilehashadunrecoverableoperationsoccurinit.Itwillneedtobebackeduporsomedatalossispossibleduringarecovery.
C.Theusers01.dbfdatafileiscorrupted.
D.Theusers01.dbfdatafilebackupexceedstheretentioncriteria.
E.Thelastbackupoftheusers01.dbfdatafilefailedandmustbererun.

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