sql语句问题

--建立测试环境
Create Table 表(id varchar(10),amount integer,re varchar(10))
--插入数据
insert into 表
select '1','3','aaa' union
select '1','5','bbb' union
select '1','4','ccc' union
select '2','10','pkoge' union
select '2','12','daf'
go
--测试语句
CREATE FUNCTION FunMergeCharField(@vchA varchar(10))
RETURNS varchar(8000)
AS
BEGIN
DECLARE @r varchar(8000)
SET @r=''
SELECT @r=@r+','+re FROM 表 WHERE id=@vchA 
RETURN(substring(@r,2,8000))
END
GO
select id,sum(amount) as sum,dbo.FunMergeCharField(id) as re叠加 from 表 group by id
 
--删除测试环境
Drop Table 表
Drop FUNCTION FunMergeCharField/*
id         sum         re叠加                                                                                                                                                                                                                                                         
---------- ----------- ---------------
1          12          aaa,ccc,bbb
2          22          pkoge,daf
*/