Whatisthecorrectorderofstepstoperformanonlinedatabasebackup?()a.alterdatabasebeginbackupb.alterdatabaseendbackupc.Backupthedatabasedatafilesd.Backupthearchivelogfilese.altersystemswitchlogfileA.a，b，c，d，eB.e，d，a，b，cC.a，c，b，d，eD.d，b，c，a，eE.a，c，b，e，d
题目
Whatisthecorrectorderofstepstoperformanonlinedatabasebackup?()a.alterdatabasebeginbackupb.alterdatabaseendbackupc.Backupthedatabasedatafilesd.Backupthearchivelogfilese.altersystemswitchlogfile
A.a，b，c，d，e
B.e，d，a，b，c
C.a，c，b，d，e
D.d，b，c，a，e
E.a，c，b，e，d