单项选择题

A. when you want to restore an important table that is ……

In which scenario will you use the Flashback Transaction Query feature？（）

A. when you want to restore an important table that is dropped from the Recycle Bin
B. when you want to obtain the SQL statements to undo the deletion of some important records from a table by a transaction
C.when you want to restore a dropped user’s schema
D. when a row of a table is updated many times within a specific time period and you want all the versions of the row in the specified time period

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热门试题

单项选择题YouquerytheORDERStableanddiscoverthatordernumber1101ismissing.Oneofyourreports，generatedat5：00A.M.onApril23，2005usingOracleReports，includesthisordernumberintheoutput.Youhaveinserted100newordersintotheORDERStablesincegeneratingthisreport.Whichflashbacktechnologywouldyouusetorecoverordernumber1101intotheORDERStablewithoutlosingthe100ordersthatyouaddedafterthereportwasgenerated？（）

A. Flashback Table
B. Flashback Query
C.Flashback Version Query
D. Flashback Transaction Query

单项选择题YoudecidetoenableFlashbackDatabaseinyourOracle10gdatabasesothatfuturerecoverieswilltakelesstimethantraditionalrecoveries.WhichofthefollowingparametersmustbeincludedinyourinitializationparameterfilebeforeenablingFlashbackDatabase？（）

A. DB_RECOVERY_FILE_DEST only
B. DB_FLASHBACK_RETENTION_TARGET only
C. DB_RECOVERY_FILE_DEST_SIZE and DB_RECOVERY_FILE_DEST only
D. DB_RECOVERY_FILE_DEST and DB_FLASHBACK_RETENTION_TARGET only
E. DB_RECOVERY_FILE_DEST_SIZE， DB_RECOVERY_FILE_DEST and
F. DB_FLASHBACK_RETENTION_TARGET

单项选择题InwhichscenariowillyouusetheFlashbackVersionQueryfeature？（）

A. when you want to restore a table that has been dropped from the Recycle Bin
B. when you want to identify the transaction ID of the transaction that deleted some important records from a table
C. when you want to recover the schema of a dropped user
D.when you want to restore a dropped tablespace

单项选择题YouareworkingasaDBAatNetFxCorporation.YoudiscoverthattheSCOTTschemaisdeletedbymistake.Youdecidetoflashthedatabasebacktothetimewhentheschemaexisted.Whichviewwillyouquerytodeterminetheestimatedsizeoftheflashbackdatathatyourequireforyourcurrenttargetretention？（）

A. V$FLASHBACK_DATABASE_LOG
B. V$FLASHBACK_DATABASE_STAT
C. V$DATABASE
D. V$UNDOSTAT

单项选择题YouhavejoinedaneworganizationasaDatabaseAdministrator.TheSecurityAdministratorinyourorganizationhaskepthumanerrors，suchaserroneouslydroppingusers，tables，andimportantdata，toaminimumbycarefullygrantingonlythenecessaryprivilegestoeachuser.Asaresultofseveralongoingtransactionswithinyourdatabase，youdiscoverthattheflashbacklogsarerapidlyincreasingintheflashrecoveryarea.Toavoidout-of-spaceerrors，youdecidetodeletetheflashbacklogsfromtheflashrecoveryarea.Howcanyoudeletetheflashbacklogsfromthedatabaseifyourdatabaseisupandrunning？（）

A. Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command and disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement.
B. Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement while the database is up and running.
C. Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command. Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement. Disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement.
D. Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement. Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command and disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement.