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多项选择题

Oracle9i provides a database package called dbms_redefinition to perform an online rebuild of a table. 
Which two steps are you recommended to do prior to issuing thedbms_redefinition_start_redef table procedure call？（）

A.Grand privileges on the interim table.
B.Invoke the dbms_redefinition.can_redef_table procedure.
C.Invoke the dbms_redefinition.sync_interim_table procedure.
D.Create any triggers， indexes， or constraints on the interim table.
E.Create an empty interim table with all the desired characteristics.

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热门试题

单项选择题Youareresponsibleforadatawarehouseapplicationthatusesrecordsfromanexternaltabletoupdateoneofthedimensiontablesperiodically.Therecordsintheexternaltablemaycontaindatafornewrowsinthedimensiontable，orforupdatestoitsexistingrows.WhichtypeofSQLcommandwouldyouusetotransferthedatafromtheexternaltabletothedimensiontableasefficientlyaspossible？（）

A.MERGE
B.SELECT …CROSS JOIN
C.INSERT ALL …SELECT
D.CREATE VIEW …CONSTRAINT

单项选择题WhatdoestheMetadataApplicationProgrammingInterface（API）allowyoutodo？（）

A.Repair damaged data dictionary entries.
B.Delete data dictionary information about database objects you no longer need.
C.Extract data definition commands from the data dictionary in a variety of formats.
D.Prepare pseudocode modules for conversion to Java or PL/SQL programs with a Metadata code generator

单项选择题The list below displays four steps that you need to execute in order to switch from the primary database role to the standby database role. Choose the correct order of execution for the steps.（）  1. Shot down and start up the former primary instance without mounting the instance.  2. Issue the ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL  STANDBY command.  3. Issue the ALTER DATABASE MOUNTS STANDBY DATABASE command.  4. End read or update activity on the former primary and standby database.

A.1，2，3，4
B.3，2，4，1
C.4，2，1，3
D.4，3，2，1

单项选择题In the Oracle9i Data Guard architecture， what is the purpose of the Log Transport Services？（）

A.A
B.B
C.C
D.D

单项选择题IfyoucreateyourdatabaseusingOracleManagedFiles（OMF），whatistrue？（）

A.You must use Oracle predefined names to identify raw partitions that will hold OMF structures. 
B.You must define directories for two online redo log groups and three copies of the control file. 
C.If your CREATE DATABASE command fails, any OMF database files that have already been created will be dropped automatically. 
D.You must use only OMF data files when adding new tablespaces or data files to your database in the future.