分区是把双刃剑，用得好效率高，用不好被坑爹。
这是我的表结构： 答案已经告诉你了，这个字段必须是主键。 扫描了全部的分区，分区在这里没有一点意义，反而拖累了性能。 原因如下： 本文出自 “贺春旸的技术专栏” 博客，请务必保留此出处
这是我的表结构：
答案已经告诉你了，美国空间，这个字段必须是主键。
扫描了全部的分区，香港虚拟主机，分区在这里没有一点意义，反而拖累了性能。
原因如下：
本文出自 “贺春旸的技术专栏” 博客，香港服务器，请务必保留此出处
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