题目内容

冲冼汽包液位计的正确方法是：①开启排水阀，让汽水同时冲洗；②关闭水阀，（）；③开启水阀，（），冲洗水通路；④开启汽阀，（），水位上升至正常处，冲洗工作完毕。

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You have a range-partitioned table in your database. Each partition in the table contains the sales data for a quarter. The partition related to the current quarter is modified frequently and other partitions undergo fewer data manipulations. The preferences for the table are set to their default values. You collect statistics for the table using the following command in regular intervals： SQL> EXECUTE DBMS_STATS.GATHER_TABLE_STATS（’SH’，’SALES’，GRANULARITY=>’GLOBAL’）； You need statistics to be collected more quickly. What can you do to achieve this？（）

A. Set DYNAMIC_SAMPLING to level 4
B. Set the STATISTICS_LEVEL parameter to BASIC
C. Set the INCREMENTAL value to TRUE for the partition table
D. Increase the value of STALE_PERCENT for the partition table

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冲冼汽包液位计的正确方法是：①开启排水阀，让汽水同时冲洗；②关闭水阀，（）；③开启水阀，（），冲洗水通路；④开启汽阀，（），水位上升至正常处，冲洗工作完毕。

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