A little test for index.

对表创建正确的索引可以加快查询速度。 一个小测试。 有一个表cpu_monitor有843240条记录， SQL desc cpu_monitor; Name

对表创建正确的索引可以加快查询速度。 一个小测试。 有一个表cpu_monitor有843240条记录， SQL> desc cpu_monitor;

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Dear friends, There is an important post on the first or second page of the forum. The post is tit