Youexecutedthefollowingquery:SELECToperation,undo_sql,table_nameFROMflashback_transaction_queryWhichstatementiscorrectregardingthequeryoutput?() A.Itwouldreturninformationregardingonlythelastcommittedtransaction.B.Itwouldreturnonlytheactivetransactionsinalltheundosegmentsinthedatabase.C.Itwouldreturnonlythecommittedtransactionsinalltheundosegmentsinthedatabase.D.Itwouldreturnbothactiveandcommittedtransactionsinalltheundosegmentsinthedatabase.E.Itwouldreturninformationregardingthetransactionsthatbeganandwerecommittedinthelast30minutes.

Youexecutedthefollowingquery:SELECToperation,undo_sql,table_nameFROMflashback_transaction_queryWhichstatementiscorrectregardingthequeryoutput?()

A.Itwouldreturninformationregardingonlythelastcommittedtransaction.

B.Itwouldreturnonlytheactivetransactionsinalltheundosegmentsinthedatabase.

C.Itwouldreturnonlythecommittedtransactionsinalltheundosegmentsinthedatabase.

D.Itwouldreturnbothactiveandcommittedtransactionsinalltheundosegmentsinthedatabase.

E.Itwouldreturninformationregardingthetransactionsthatbeganandwerecommittedinthelast30minutes.

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Youexecutedthefollowingquery:SELECToperation,undo_sql,table_nameFROMflashback_transaction_query;Whichstatementiscorrectregardingthequeryoutput?() A.Itwouldreturninformationregardingonlythelastcommittedtransaction.B.Itwouldreturnonlytheactivetransactionsinalltheundosegmentsinthedatabase.C.Itwouldreturnonlythecommittedtransactionsinalltheundosegmentsinthedatabase.D.Itwouldreturnbothactiveandcommittedtransactionsinalltheundosegmentsinthedatabase.E.Itwouldreturninformationregardingthetransactionsthatbeganandwerecommittedinthelast30minutes.
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At5：30PM，adatabaseadministrator，William，isinformedthatanimportantrecordofemployeenoE0025ismissingfromtheSCOTT.EMPLOYEEtable.At4：30P.M，thetablecontainedtherecordofemployeenoE0025.WilliamissuesthefollowingcommandtofindtheSQLstatementsthatareusedtoundothedeletion：SELECToperation，undo_sql，logon_userFROMFLASHBACK_TRANSACTION_QUERYWHERExid=HEXTORAW（’0100043E23456’）；where’0100043E23456’isthetransactionIDofthetransactionthatdeletedtherow.Beforeissuingtheabovestatement，whichtaskdidWilliamperformtoidentifythetransactionIDofthetransactionthatdeletedtherow？（）
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