单项选择题
A. To create and execute an RMAN stored script，you must use a recovery catalog.
B. When executing a stored script and a command fails，the remainder of the script is executed，and a message is written to the alert log file.
C. RMAN stored scripts can always be executed against any target database that is registered in the recovery catalog.
D. When you execute a stored script，it always executes using the persistent channel settings previously set with the CONFIGURE command.
单项选择题 Whichtuningtoolrecommendshowtooptimizematerializedviewssothattheseviewscantakeadvantageofthegeneralqueryrewritefeature？（）
单项选择题 Observe the following warning in an RMAN session of your database instance： WARNING： new failures were found since last LIST FAILURE command Which statement describes the scenario that must have produced this warning？（）
单项选择题 Examine the output of the query that you executed to list the objects in the recycle bin: You verified that no table named SALES_TAB exists in the schema. Then you executed the following command to purge the objects in the recycle bin: SQL> PURGE TABLE sales_tab; What would be the outcome of this command?（）