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At5:30PM,adatabaseadministrator,William,isinformedthatanimportantrecordofemployeenoE0025ismissingfromtheSCOTT.EMPLOYEEtable.At4:30P.M,thetablecontainedtherecordofemployeenoE0025.WilliamissuesthefollowingcommandtofindtheSQLstatementsthatareusedtoundothedeletion:
SELECToperation,undo_sql,logon_user
FROMFLASHBACK_TRANSACTION_QUERYWHERExid=
HEXTORAW(’0100043E23456’);
where’0100043E23456’isthetransactionIDofthetransactionthatdeletedtherow.Beforeissuingtheabovestatement,whichtaskdidWilliamperformtoidentifythetransactionIDofthetransactionthatdeletedtherow?()
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更多 “ 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?() ” 相关考题
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