GROUP BY 排序的问题_group by rollup 排序失效-优快云博客

本文链接：https://blog.youkuaiyun.com/lsd123/article/details/2689125

本文介绍了一种在SQL查询中使用GROUP BY进行分组汇总的同时添加合计行的方法。通过使用CASE WHEN语句结合GROUPING函数和WITH ROLLUP选项，可以实现在每个分组下自动计算合计值。

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我希望每次用 GROUP BY 排序完都加相应的合计该怎么做？

如：我用select A,B,C from Table group by A,B,C查出结果为
A B C VALUE
a1 b1 c1 1
a1 b1 c2 2
a1 b1 c3 3
a1 b2 c2 2
a1 b2 c3 3
a1 b2 c1 1
a2 b1 c1 1
a2 b1 c2 2
a2 b1 c3 3
a2 b2 c3 3
a2 b2 c2 2
a2 b2 c1 1
我希望查出
A B C VALUE
a1 b1 c1 1
a1 b1 c2 2
a1 b1 c3 3
a1 b1 合计 6
a1 b2 c2 2
a1 b2 c3 3
a1 b2 c1 1
a1 b2 合计 6
a2 b1 c1 1
a2 b1 c2 2
a2 b1 c3 3
a2 b1 合计 6
a2 b2 c3 3
a2 b2 c2 2
a2 b2 c1 1
a2 b2 合计 6
该怎么做？

SQL code

--> liangCK小梁 于2008-07-22
--> 生成测试数据: #T
if object_id('tempdb.dbo.#T') is not null drop table #T
create table #T (A varchar(2),B varchar(2),C varchar(2),VALUE int)
insert into #T
select 'a1','b1','c1',1 union all
select 'a1','b1','c2',2 union all
select 'a1','b1','c3',3 union all
select 'a1','b2','c2',2 union all
select 'a1','b2','c3',3 union all
select 'a1','b2','c1',1 union all
select 'a2','b1','c1',1 union all
select 'a2','b1','c2',2 union all
select 'a2','b1','c3',3 union all
select 'a2','b2','c3',3 union all
select 'a2','b2','c2',2 union all
select 'a2','b2','c1',1

select A,
       B,
       case when grouping(C)=0 then C else N'合计' end C,
     sum(Value) Value
from #T
group by A,B,C
with rollup
having grouping(A)=0 and grouping(B)=0 

/*
A    B    C    Value
---- ---- ---- -----------
a1   b1   c1   1
a1   b1   c2   2
a1   b1   c3   3
a1   b1   合计   6
a1   b2   c1   1
a1   b2   c2   2
a1   b2   c3   3
a1   b2   合计   6
a2   b1   c1   1
a2   b1   c2   2
a2   b1   c3   3
a2   b1   合计   6
a2   b2   c1   1
a2   b2   c2   2
a2   b2   c3   3
a2   b2   合计   6

(16 行受影响)
*/