多项选择题
A. You can use this feature to identify the committed versions of the rows， but not the uncommitted versions.
B. You can use this feature to identify the versions of V$ views.
C. You can use this feature to identify the inserts， deletes， and updates performed on a particular row but not the data definition language （DDL） operations performed on the table.
D. You can use this feature for a table only if row movement is enabled for the table.
E. You can use this feature to identify the versions of external and fixed tables.
多项选择题 YouexecutedthefollowingFLASHBACKTABLEcommand：FLASHBACKTABLEempTOTIMESTAMP（’11：45’，’hh12：mi’）；Whichtwostatementsarecorrect？（）
单项选择题 EverySunday，consistentbackupsareperformedonyourdatabase.Becauseofausererror，you performedanincompleterecoveryonTuesdayandopenedthedatabasewiththeRESETLOGSoption.AusererroroccursagainonThursday，whichnecessitatesanincompleterecovery.Sunday’sbackupisthemostrecentbackupavailable.Whatwouldyoudointhisscenario？（）
单项选择题 Thelossofthecontrolfileforcedyoutore-createthecontrolfile.Afterre-creatingitandopeningthedatabase，youfindthatsomeofthedatafilesarenamedasMISSINGnnnnn，wherennnnnisafive-digitnumberstartingwith0.Whatcouldbethepossiblereason？（）