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求 sql select怎么同时查询2个值

WBOY
Release： 2016-06-23 14:23:20
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比如 在数据库中 一个键hide=y和hide=n 要同时实现出等于y和n的数据要怎么写
sql的语句不是很懂 我是这么写的 虽然没报错
SELECT * FROM blog WHERE type='$type' $author and hide='y' and hide='n' $condition $limit
但是却都不显示
SELECT * FROM blog WHERE type='$type' $author and hide='y' $condition $limit
这样就可以 但是这能显示等于Y的 不能实现出等于n的


回复讨论(解决方案)

你的 $author $condition 分别是什么？

类似的，修改看看 

SELECT * FROM `blog`  WHERE `type` = "$type"     AND `author` = "$author"     AND `hide` in ("y", "n")LIMIT
Copy after login

用or不就可以了嘛。干嘛要用and呀~怎么可能同时等于y又等于n

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求 sql select怎么同时查询2个值
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