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mysql 数据库-mysql问题：从三个表查询数据优化

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Release： 2016-06-06 09:45:26
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mysqlmysql 数据库

我有三个表，三个表的数据全部查询出来再排序，三个表的数据都很大，如何查询才能最节省资源，最优。

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mysql mysql 数据库
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