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85问答库 > 在SQL语句中如果是GROUP BY A，B，C；那最后到底是怎么分的组，是按谁分的组？

在SQL语句中如果是GROUP BY A，B，C；那最后到底是怎么分的组，是按谁分的组？

2025-04-07 06:32:22

推荐回答（2个）

回答1：

按A,B,C分组.比如
A,B,C,D
A,B,C,E
A,C,F
那么就有两组.前两个都有ABC是一组.后者没有.是单独一组.

回答2：

都有用上，就是查询出来的记录首先是先按A字段排序，然后按B字段排序，再之后按C字段排序

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