052-40

You have statistics collected for some selected tables. Your requirement is that the statistics for the tables and all dependent indexes must not be overwritten by further statistics collection until a certain point of time.
How would you achieve this?
A. Lock statistics for the tables.
B. Change STALE_PERCENT to zero for the tables.
C. Set the TIMED_STATISTICS parameter to TRUE.
D. Set the STATISTICS_LEVEL parameter to BASIC.
E. Set the OPTIMIZER_USE_PENDING parameter statistics to TRUE.

可以直接锁定统计信息。