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show columns from是干啥用的

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Release： 2016-06-13 12:21:02
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show columns from是做啥用的
在php代码中看到这样的一句话 show columns from，不知是干啥滴
------解决思路----------------------
运行一下不就知道了么，显示表的结构信息，比如判断这个表是否有某个字段
------解决思路----------------------
显示表字段结构详细信息

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