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