单项选择题
A.backup database plus archivelog
B.backup database plus archivlog until time ‘10:00‘
C.backup database plus archivelog timeout ‘10:00‘
D.backup database plus archivelog duration 10:00
单项选择题 ouhavebackedupyourdatabasetwicewithoutconnectingtotherecoverycatalog.Whatcommanddoyouissuetotransferthecontrol-filemetadatatotherecoverycatalog?（）
单项选择题 Whichcommandwouldyouusetodeterminewhatdatabasebackupsarecurrentlyavailableforrestore?（）
单项选择题 YouareusingRMANtobackupyourARCHIVELOGmodedatabase.Youhaveenabledcontrol-fileautobackups.WhichfilesarenotbackedupduringtheRMANbackup?（）