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SQL code:
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id value
----- ------
1 aa
1 bb
2 aaa
2 bbb
2 ccc
ÐèÒªµÃµ½½á¹û£º
id values
------ -----------
1 aa,bb
2 aaa,bbb,ccc
¼´£ºgroup by id, Çó value µÄºÍ£¨×Ö·û´®Ïà¼Ó£©
1. ¾ÉµÄ½â¾ö·½·¨(ÔÚsql server 2000ÖÐÖ»ÄÜÓú¯Êý½â¾ö¡£)
--1. ´´½¨´¦Àíº¯Êý
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
CREATE FUNCTION dbo.f_str(@id int)
RETURNS varchar(8000)
AS
BEGIN
DECLARE @r varchar(8000)
SET @r = ''
SELECT @r = @r + ',' + value from tb WHERE id=@id
RETURN STUFF(@r, 1, 1, '')
END
GO
-- µ÷Óú¯Êý
SELECt id, value = dbo.f_str(id) from tb GROUP BY id
drop table tb
drop function dbo.f_str
/*
id value
----------- -----------
1 aa,bb
2 aaa,bbb,ccc
£¨ËùÓ°ÏìµÄÐÐÊýΪ 2 ÐУ©
*/
--2¡¢ÁíÍâÒ»ÖÖº¯Êý.
create table tb(id int, value varchar(10))
insert into tb values(1, 'aa')
inser
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