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###【###group by 多个字段,字段顺序对查询结果数据没有影响,只是record顺序不同而已】02拓展:【GROUP BY分组查询与SQL执行顺序】
======01【###group by 多个字段,字段顺序对查询结果数据没有影响,只是record顺序不同而已】 转自:https://bbs.csdn.net/topics/390159884 group by 后面的字段顺序 只是影响了结果的顺序不会影响结果的值。如果是 group by a,...