求一条SQL语句，不用存储过程

Question

有个表如下：
 id       name           sequence
 1         a              1
 1         b              2
 1         c              3
 2         f              1
 2         g              2
 3         r              1
想实现的选择后，出现下面的情况：
 id              name
  1              a b c
  2              f g
  3               r请各位帮忙解答啊，万分感谢.不要写存储过程

Answer 1

select id,
       stuff((select ','+name
              from tb
              where ID=t.id
              for xml path('')),1,1,'')
from tb t
group by id

Answer 2

/*表结构，数据如下：  
id    value  
----- ------  
1    aa  
1    bb  
2    aaa  
2    bbb  
2    ccc  需要得到结果：  
id    values  
------ -----------  
1      aa,bb  
2      aaa,bbb,ccc  
即：group by id, 求 value 的和（字符串相加） */ 1. 旧的解决方法(在sql server 2000中只能用函数解决。)  
--====================================================== 
create table tb(id int, value varchar(10))  
insert into tb values(1, 'aa')  
insert into tb values(1, 'bb')  
insert into tb values(2, 'aaa')  
insert into tb values(2, 'bbb')  
insert into tb values(2, 'ccc')  
go  
--1. 创建处理函数 
CREATE FUNCTION dbo.f_strUnite(@id int)  
RETURNS varchar(8000)  
AS  
BEGIN  
    DECLARE @str varchar(8000)  
    SET @str = ''  
    SELECT @str = @str + ',' + value FROM tb WHERE id=@id  
    RETURN STUFF(@str, 1, 1, '')  
END  
GO  
-- 调用函数 
SELECt id, value = dbo.f_strUnite(id) FROM tb GROUP BY id  
drop table tb  
drop function dbo.f_strUnite  
go 
/*  
id          value       
----------- -----------  
1          aa,bb  
2          aaa,bbb,ccc  
（所影响的行数为 2 行）  
*/  
--====================================================== 
2. 新的解决方法(在sql server 2005中用OUTER APPLY等解决。)  
create table tb(id int, value varchar(10))  
insert into tb values(1, 'aa')  
insert into tb values(1, 'bb')  
insert into tb values(2, 'aaa')  
insert into tb values(2, 'bbb')  
insert into tb values(2, 'ccc')  
go  
-- 查询处理 
SELECT * FROM(SELECT DISTINCT id FROM tb)A OUTER APPLY(  
        SELECT [values]= STUFF(REPLACE(REPLACE(  
            (  
                SELECT value FROM tb N  
                WHERE id = A.id  
                FOR XML AUTO  
            ), ' <N value="', ','), '"/>', ''), 1, 1, '')  
)N  
drop table tb  /*  
id          values  
----------- -----------  
1          aa,bb  
2          aaa,bbb,ccc  (2 行受影响)  
*/  --SQL2005中的方法2 
create table tb(id int, value varchar(10))  
insert into tb values(1, 'aa')  
insert into tb values(1, 'bb')  
insert into tb values(2, 'aaa')  
insert into tb values(2, 'bbb')  
insert into tb values(2, 'ccc')  
go  
select id, [values]=stuff((select ','+[value] from tb t where id=tb.id  
for xml path('')), 1, 1, '')  
from tb  
group by id  
/*  
id          values  
----------- --------------------  
1          aa,bb  
2          aaa,bbb,ccc   
*/  drop table tb    

Answer 3

if not object_id('tb') is null
drop table tb
Go
Create table tb([id] int,[name] nvarchar(1),[sequence] int)
Insert tb
select 1,N'a',1 union all
select 1,N'b',2 union all
select 1,N'c',3 union all
select 2,N'f',1 union all
select 2,N'g',2 union all
select 3,N'r',1
Go
select id,
       stuff((select ','+name
              from tb
              where ID=t.id
              for xml path('')),1,1,'')[name]
from tb t
group by id
/*
id          name
----------- --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1           a,b,c
2           f,g
3           r(3 row(s) affected)
*/

Answer 4

declare @TB table (id int, value varchar(10))  
insert into @TB values(1, 'aa')  
insert into @TB values(1, 'bb')  
insert into @TB values(2, 'aaa')  
insert into @TB values(2, 'bbb')  
insert into @TB values(2, 'ccc')  SELECT * ,
stuff((select ','+t.value
              from @TB t
              where t.ID=A.id
              for xml path('')),1,1,'')[name]
FROM(SELECT DISTINCT id FROM @TB)A