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MySQL小技巧总结_MySQL

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Release： 2016-06-01 13:11:08
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1.MySQL避免相同数据重复插入

若用户注册表有一列是email,避免相同email注册多个账号,那么就设置email为unique,这样就使email是唯一的,不会重复.

当插入的email和原来的一个email相同,则无法插入新的数据.

alter table table_name add unique email
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