Whatdoestheoutputonthisreportindicate？（）RMAN>reportneedbackup；RMANretentionpolicywillbeappliedtothecommandRMANretentionpolicyissettoredundancy1Reportoffileswithlessthan1redundantbackupsFilebkpsName50C：\ORACLE\ORADATA\ORCL\MY_DATA_01.DBFA.Themy_data_01.dbf
题目
Whatdoestheoutputonthisreportindicate？（）RMAN>reportneedbackup；RMANretentionpolicywillbeappliedtothecommandRMANretentionpolicyissettoredundancy1Reportoffileswithlessthan1redundantbackupsFilebkpsName50C：\ORACLE\ORADATA\ORCL\MY_DATA_01.DBF
A.Themy_data_01.dbfdatafileiscorruptedandneedstoberestored.
B.Themy_data_01.dbfdatafilehasnotyetbeenbackedup.Thisreportdoesnotimplythatthedatainthedatafilecannotberecovered.
C.Themy_data_01.dbfdatafilehasnotyetbeenbackedup.Thisreportimpliesthatthedatainthedatafilecannotberecovered.
D.Themy_data_01.dbfdatafilenolongermeetstheretentioncriteriaforbackups.
E.Datafile5ismissing.