数据库列问题

[wms05128]

有一数据库表如下：
ID NAME
1 ABC
2 BCD
3 MPD
4 MB
5 LP
要求出NAME列的所有数据，并将数据存入一个字符串，如：ABC,BCD,MPD,MB,LP这样

[ws_hgo]

if object_id('A') is not null drop table A
go
create table A
(
  ID int identity(1,1) primary key,
  Name varchar(20)
)
insert into A select 'ABC'
insert into A select 'BCD'
insert into A select 'MPD'
insert into A select 'MB'
insert into A select 'LP'
go


create function dbo.f_str1()
 returns varchar(1000) 
 as 
 begin 
   declare @str varchar(1000) 
   select @str = isnull(@str + ',' , '') + Name from A
   return stuff(@str,1,1,'')
 end 


select distinct dbo.f_str1() from A


----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
BC,BCD,MPD,MB,LP

(1 行受影响)

[ws_hgo]

兄弟你的结贴率
很低
注意结贴

[dawugui]

[Quote=引用 2 楼 ws_hgo 的回复:]
兄弟你的结贴率
很低
注意结贴
[/Quote]哈哈。

----------------------------------------------------
/*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

[dawugui]

太快了撒。

[ws_hgo]

[Quote=引用 4 楼 dawugui 的回复:]

太快了撒。
[/Quote]

哈哈
老D吃饭了没有啊

[gw6328]

declare @xml xml
select [name]+',' from tb for xml path('')
select left(cast(@xml as nvarchar(max)),len(cast(@xml as nvarchar(max)))-1)

[闹铃]

use tempdb;
create table dbo.test
(
  id int,
  name varchar(10)
)
insert into dbo.test
values  (1, 'ABC'),
		(1, 'BCD'),
		(2 ,'MPD'),
		(2 ,'MB'),
		(2 ,'LP'); --sql server 2008 新增

declare @temp table
(
  id   int,
  name varchar(100)
);
insert into @temp
select distinct id,''
from dbo.test;

declare @id int;
declare @name varchar(10);

declare cur_test cursor for
select id,name from dbo.test;
open cur_test
fetch next from cur_test into @id,@name;
while @@FETCH_STATUS=0
  begin 
        update @temp
        set name=name+@name+','
        where id=@id;
        fetch next from cur_test into @id,@name;
  end
close cur_test;
deallocate cur_test;

select ID,left(name,LEN(name)-1)as name 
from @temp;

/***

ID          name
----------- -----------
1           ABC,BCD
2           MPD,MB,LP

(2 行受影响)

***/

[闹铃]

declare @str varchar(1000);
select @str = coalesce(@str+',','')+ Name from dbo.test;
print @str;
---的确很妙！