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使用count(disctinct xxx) 时数据不对。Mysql 的 bug 还是服务器性能的原因?
Posted by: edward Xiao
Date: October 12, 2015 03:19AM

当我使用 select disctinct feild1 from bable1 ; 是有数据的。

但当我使用 select count(disctinct feild1) from bable1 ; 经常返回0, 偶尔查询正常。

有明白的专家或者遇到过这个问题的小伙伴请帮忙解释一下。 我QQ786708739

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使用count(disctinct xxx) 时数据不对。Mysql 的 bug 还是服务器性能的原因?
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October 12, 2015 03:19AM


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