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mysql学习遇到的问题，

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Release： 2016-06-06 09:39:34
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mysql

外键。。和多表连接查询。。。是不是没关联啊。

怎么利用外键来查询。

因为工作原因，自学阶段，很多问题没法上机测试，所以来求助。。

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