Examine the following commands and their output:View the exhibit and examine the Flashback Version Query that was executed after the preceding commands.What could be the possible cause for the query not displaying any row?()
A. Flashback logging is not enabled for the database.
B. The changes made to the table are not committed.
C. Supplemental logging is not enabled for the database.
D. The database is not configured in ARCHIVELOG mode.
第1题:
A. followed,followed
B. followed,following
C. following,followed
D. following,following
第2题:
A.QuerytheV$FLASHBACK_DATABASE_LOGview.
B.QuerytheV$FLASHBACK_DATABASE_STATview.
C.CheckthevalueoftheDB_FLASHBACK_RETENTION_TARGETinitializationparameter.
D.QuerytheV$RECOVERY_FILE_DESTview.
第3题:
A.expect
B.expedite
C.exercise
D.examine
第4题:
Nothing in these Rules shall ______ any vessel,or the owner,master or crew thereof,from the consequences of any precaution which may be required by the ordinary practice of seaman,or by the special circumstances of the case.
A.exonerate
B.exhaust
C.exercise
D.examine
第5题:
第6题:
ThesearethedetailsaboutV$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.
第7题:
A.Thetimewhenthelastflashbackoperationinyourdatabasewasperformed.
B.Thetimewhenthefirstflashbackoperationinyourdatabasewasperformed.
C.AlistofflashbackoperationsperformedinyourdatabaseusingSCNandtime.
D.Theapproximatetimeandthelowestsystemchangenumber(SCN)towhichyoucanflashbackyourdatabase.
第8题:
A、check
B、examine
第9题:
检查
A.expect
B.except
C.excuse
D.examine
第10题: