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。
原文：http://www.cnblogs.com/Babylon/p/7988028.html