sql 多记录并单记录

CREATE Function dbo.JoinStr(@SNO as varchar(20))
returns varchar(8000)
begin
declare @s as varchar(8000)
set @s=''
select @s=@s+','+ltrim(rtrim(Name1 )) from
(
select Name1 from table1  where ID=@SNO
)
A
set @s=stuff(@s,1,1,'')
return  @s
end