单项选择题
A. Only the WAREHOUSE_DETAILS table is recovered， and none of the dependent objects are recovered.
B. The WAREHOUSE_DETAILS table is recovered along with the NOT NULL constraints， primary key constraint， and the referential integrity constraints.
C. The WAREHOUSE_DETAILS table is recovered along with all the dependent objects except the indexes and triggers previously removed from the Recycle Bin.
D. The WAREHOUSE_DETAILS table is recovered along with all the dependent objects except the referential integrity constraints and the indexes and triggers previously removed from the Recycle Bin.
多项选择题 OnJan11，2005at2：30P.M.，anerroneousupdateoperationmodifiedallthevaluesofcolumnLASTNAMEintheEMPLOYEEtableintheScottschematoanemptystring.Youarethesystemadministrator，andyouwanttoreturntheoriginalvaluesinthetable.Todoso，youdecidedtoflashbackthetable.Whichtwooptionscanyouusetoflashbackatable？（）
单项选择题 YouwanttousetheFlashbackTransactionQueryfeaturetoidentifyallthechangesmadetoyourdatabasewithinaspecifictimeperiod.WhatisaprerequisiteforusingtheFlashbackTransactionQueryfeature？（）
单项选择题 At 5：30 PM， a database administrator， William， is informed that an important record of employee no E0025 is missing from the SCOTT.EMPLOYEE table. At 4：30 P.M， the table contained the record of employee no E0025. William issues the following command to find the SQL statements that are used to undo the deletion： SELECT operation， undo_sql， logon_user FROM FLASHBACK_TRANSACTION_QUERY WHERE xid= HEXTORAW（’0100043E23456’）； where ’0100043E23456’ is the transaction ID of the transaction that deleted the row. Before issuing the above statement， which task did William perform to identify the transaction ID of the transaction that deleted the row？（）
