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Oracle 11G OCP 1Z0-052 40

原创 Oracle 作者:LuiseDalian 时间:2014-06-09 06:40:24 0 删除 编辑
(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.

答案:(A)

解析:

A. 可以使用DBMS_STATS.LOCK_TABLE_STATS过程

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