[英]GROUP_CONCAT of SUMs
我有两个选择查询,都可以给出正确的结果:
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,该查询为我提供sum1
和所有sum2
项的GROUP_CONCAT的结果。 但是,如何在sum2
-items元素的GROUP_CONCAT内定义GROUP BY?
SELECT SUM(value) AS "sum1", GROUP_CONACAT(SUM(value) AS "sum2" ... (?))
FROM table GROUP BY id1
您应该使用子查询来解决它,使用以下查询,我相信它将解决您的问题
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
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