At the end of the financial year， an accounts accumulation batch is run. This batch updates the company’s accounting records. During the batch run process， some incorrect entries were inserted into the ACCOUNT table. You identified the bug and immediately stopped the batch run process， but 3000 incorrect records were inserted into the ACCOUNT table before the batch process was stopped. You want to recover the table to the state it was at 11：50 P.M. Which flashback feature will you use？（）

多项选择题You issued the following command：        SQL> DROP TABLE MYTABLE；        SQL> SHOW RECYCLEBIN  The following output is returned：        ORIGINAL NAME RECYCLEBIN NAME               OBJECT TYPE      DROP TIME        ------------- ------------------------------ --------------- --------------------        MYTABLE BIN$04LhcpndanfgMAAAAAANPw==$0     TABLE           2005-01-13：20：11：31  You want to drop the table， MYTABLE， from the Recycle Bin. Which two commands can you issue to accomplish the desired task？（）

A. DROP TABLE MYTABLE PURGE；
B. PURGE RECYCLEBIN；
C. PURGE TABLE MYTABLE；
D. PURGE TABLE BIN$04LhcpndanfgMAAAAAANPw==$0；

多项选择题YouareperformingflashbackoftheEMPLOYEEtableinSCOTT’sschemabecausesomeincorrectdatawasinsertedintothetableandcommittedbymistake.WhichtwoclauseswillyouuseintheFLASHBACKTABLEstatementforusingtheFlashbackTablefeature？（）

A. RESETLOGS
B. TO TIMESTAMP
C. TO BEFORE DROP
D. RENAME TO
E. TO SCN

单项选择题You are working as a Database Administrator. You erroneously dropped an important table named WAREHOUSE_DETAILS. The table resides in a non-SYSTEM tablespace.  The following dependent objects have been defined on the dropped table：       Due to limited space， some of the indexes and triggers have been removed from the Recycle Bin. You decide to recover the table by using Flashback Drop. You execute the following statement： SQL>FLASHBACK TABLE warehouse_details TO BEFORE DROP；   What will be the implication of executing this statement？（）

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？（）

A. by using Oracle Enterprise Manager
B. by issuing the FLASHBACK TABLE statement at the RMAN prompt
C. by issuing the FLASHBACK TABLE statement at the SQL prompt
D. by issuing the FLASHBACK TABLE statement at the LSNRCTL prompt

单项选择题YouwanttousetheFlashbackTransactionQueryfeaturetoidentifyallthechangesmadetoyourdatabasewithinaspecifictimeperiod.WhatisaprerequisiteforusingtheFlashbackTransactionQueryfeature？（）

A. You must use automatic undo management in the database.
B. You must configure OMF in your database.
C. You must configure ASM for storing the datafiles.
D. You must multiplex the online redo log file.