type inum
1 2
2 3
3 5
1 4
2 8
3 11select count(*) from 表 group by typetype count
1 6
2 11
3 16现在想要把类型1,2的合并count
type count
1和2 17
3 16该如何写
1 2
2 3
3 5
1 4
2 8
3 11select count(*) from 表 group by typetype count
1 6
2 11
3 16现在想要把类型1,2的合并count
type count
1和2 17
3 16该如何写
go
insert tb
select 1, 2 union all
select 2 ,3 union all
select 3 ,5 union all
select 1 ,4 union all
select 2 ,8 union all
select 3 ,11select type,SUM(num)num from (
select case TYPE when 2 then 1 when 1 then 1 else 3 end type,num from tb)a group by type
/*
type num
1 17
3 16
*/
select case TYPE when 2 then '1'+'和2' when 1 then '1'+'和2' else '3' end type,num from tb)a group by type
/*
type num
1和2 17
3 16
*/
use tempdb
go
create table tb (type int ,num int)
go
insert tb
select 1, 2 union all
select 2 ,3 union all
select 3 ,5 union all
select 1 ,4 union all
select 2 ,8 union all
select 3 ,11select type ,sum(num) as num from (select case when type=1 then '1和2' when type=2 then '1和2' else '3' end type, sum(num) as num from tb group by type)a group by typetype num
---- -----------
1和2 17
3 16(2 行受影响)