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求MySQL 判断列是不是存在 不存在创建 的语句

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Release： 2016-06-13 11:05:32
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求MySQL 判断列是否存在 不存在创建 的语句
求MYSQL 判断列是否存在 不存在创建 的语句（因为之前使用的一款程序加个功能，需要为表加个列）
------解决方案--------------------
查看 ALTER 指令的用法

据观察，并没有对添加已存在的字段有什么限制
显然同名字段是不会并列的

Related labels：
alter mysql nbsp
source：php.cn
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