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042-152

原创 Linux操作系统 作者:jbymy2000 时间:2012-03-15 15:58:47 0 删除 编辑
152. The ST_INFO master table has millions of rows that are updated very rarely. It has a STATE_CODE column that contains the value for 25 states. The table is frequently queried on the STATE_CODE column. Which type of index would you suggest to improve the query performance?
A) B-tree
B) bitmap
C) reverse key
D) function based
答案:B

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