查出的1列字段,连成字符并用,号隔开 ？

[zhouwei7682719]

select Cid from E where Pid=(select id from R where [name]='水果')

[dawugui]

/*如何将一列中所有的值一行显示
数据源
  a
  b
  c
  d
  e
结果
a,b,c,d,e
*/

create table tb(col varchar(20))
insert tb values ('a')
insert tb values ('b')
insert tb values ('c')
insert tb values ('d')
insert tb values ('e')
go

--方法一
declare @sql varchar(1000)
set @sql = ''
select @sql = @sql + t.col + ',' from (select col from tb) as t
set @sql='select result = ''' + left(@sql , len(@sql) - 1) + ''''
exec(@sql)
/*
result     
---------- 
a,b,c,d,e,
*/

--方法二
declare @output varchar(8000)
select @output = coalesce(@output + ',' , '') + col from tb
print @output
/*
a,b,c,d,e
*/

drop table tb

[快溜]

select cid=stuff((select ','+cid from R for xml path('')),1,1,'')

[飘零一叶]

--1
declare @s varchar(1000)
select @s=isnull(@s+',','')+Cid from E where Pid=(select id from R where [name]='水果')
select @s

--2
select stuff((select ','+Cid from E where Pid=(select id from R where [name]='水果') for xml path('')),1,1,'')