GROUP_CONCAT of SUMs

Question

我有两个选择查询，它们都给出了正确的结果：

SELECT SUM(value) AS "sum1" FROM table GROUP BY id1

和

SELECT SUM(value) AS "sum2" FROM table GROUP BY id1, id2

sum1是所有sum2-项的总和，我想要一个查询，它给我一个sum1的结果和所有sum2-项的GROUP_CONCT。但是，如何在GROUP_CONCT中为sum2-items元素定义GROUP BY呢？

SELECT SUM(value) AS "sum1", GROUP_CONACAT(SUM(value) AS "sum2" ... (?))
FROM table GROUP BY id1

Answer 1

你应该使用子查询来解决它，使用下面的查询，我相信它会解决你的问题

select sum(t.part_sum) as sum1, group_concat(t.part_sum) as sum2 from (select sum(value) as part_sum from table group by id1, id2) as t