使MySQL IN子句区分大小写

本文介绍了使MySQL IN子句区分大小写的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

有人知道我如何使IN子句以区分大小写的方式运行吗?我已经看到COLLATE可以与LIKE一起用于字符串搜索，但是我不知道它是否或如何与IN一起使用.例如，我想做

Does anyone know how I can make an IN clause behave in a case sensitive manner? I have seen that COLLATE can be used with LIKE for string searching but I don't know if or how it can be used with IN. For example I want to do something like

SELECT * FROM pages_table WHERE topic IN ('Food','NightLife','Drinks')

我希望它返回主题为食物"的页面，而不返回主题为食物"的页面，这是此查询当前发生的情况.谢谢.

And I want it to return pages where the topic is 'Food' but not those where the topic is 'food' which is currently what happens on this query. Thanks.

推荐答案

您实际上可以像在其他示例中看到的那样使用它:

You can actually use it as you have likely seen in other examples:

SELECT *
FROM pages_table
WHERE CAST(topic AS CHAR CHARACTER SET latin1)
        COLLATE latin1_general_cs IN ('Food','NightLife','Drinks')

这会将字符集更改为支持区分大小写的字符集，然后对列进行排序(根据您自己的字符编码，您可能不必这样做).

This changes the character set into one that supports case sensitivity and then collates the column (you may not have to do this depending on your own character encoding).

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