create function fn_test(@dh varchar(10))
returns varchar(100)
AS
begin
declare @str varchar(100)
set @str=''
select @str=@str+'/'+mx from aa where dh=@dh
if len(@str)>1
set @str=stuff(@str,1,1,'')return @str
endGO
select dh,dbo.fn_test(dh) as mx
from aa
group by dh
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货