ThesearethedetailsaboutV$FLASHBACK_DATABASE_STAT：SQLDESCV$FLASHBACK_DATABASE_STATNameNull？Type-----------------------------------BEGIN_TIMEDATEEND_TIMEDATEFLASHBACK_DATANUMBERDB_DATANUMBERREDO_DATANUMBERESTIMATED_FLASHBACK_SIZENUMBERWhichtwostatementsregardingtheV$FLASHBACK_DATABASE_STATviewaretrue？（）A.BEGIN_TIMEisthetimeatwhichFlashbackloggingisenabled.B.END_TIMEisthetimeatwhichthequeryisexecutedontheview.C.REDO_DATAisthenumberofbytesofredodatawrittenduringtheinterval.D.Thisviewcontainsinformationaboutflashbackdatapertainingtothelast24hours.E.FLASHBACK_DATAistheamountofflashbackdatageneratedsincethedatabasewasopened.
ThesearethedetailsaboutV$FLASHBACK_DATABASE_STAT：SQL>DESCV$FLASHBACK_DATABASE_STATNameNull？Type-----------------------------------BEGIN_TIMEDATEEND_TIMEDATEFLASHBACK_DATANUMBERDB_DATANUMBERREDO_DATANUMBERESTIMATED_FLASHBACK_SIZENUMBERWhichtwostatementsregardingtheV$FLASHBACK_DATABASE_STATviewaretrue？（）
A.BEGIN_TIMEisthetimeatwhichFlashbackloggingisenabled.
B.END_TIMEisthetimeatwhichthequeryisexecutedontheview.
C.REDO_DATAisthenumberofbytesofredodatawrittenduringtheinterval.
D.Thisviewcontainsinformationaboutflashbackdatapertainingtothelast24hours.
E.FLASHBACK_DATAistheamountofflashbackdatageneratedsincethedatabasewasopened.
相关考题：
FlashbackDatabaseisenabledinyourOracle10gdatabase.Oneofyourdatabaseuserserroneouslypurgedanimportanttableresidinginhisschema.Thetablewaspurgedsometimebetween10：00P.M.and10：30P.M.Thenextday，youdecidetoflashbackthedatabase.Beforeyouflashbackthedatabase，youwanttoensurethatyouhaveallthenecessaryflashbackdata.Whichdynamicperformanceviewmustyouusetodeterminewhetheryouhavetherequiredflashbackdatatorecoverthepurgedtable？（）A.V$DATABASEB.V$UNDOSTATC.V$FLASHBACK_DATABASE_LOGD.V$FLASHBACK_DATABASE_STAT