if not object_id('tb') is null drop table tb Go Create table tb([序号] nvarchar(1),[数值1] int,[数值2] int,[数值3] int) Insert tb select N'A',1,11,111 union all select N'B',2,22,222 union all select N'C',3,33,333 union all select N'C',4,44,444 union all select N'B',5,55,555 union all select N'B',6,66,666 union all select N'A',7,77,777 Go Select 序号, sum(数值1)数值1, stuff((select ','+ltrim([数值2])from tb where [序号]=t.[序号] for xml path('')),1,1,''), max([数值3])[数值3] from tb t group by 序号
/*------------------------------------------------------------------ -- Author : htl258(Tony) -- Date : 2010-04-13 11:15:13 -- Version: Microsoft SQL Server 2008 (RTM) - 10.0.1600.22 (Intel X86) Jul 9 2008 14:43:34 Copyright (c) 1988-2008 Microsoft Corporation Developer Edition on Windows NT 5.1 <X86> (Build 2600: Service Pack 3)------------------------------------------------------------------*/ --> 生成测试数据表:tbIF OBJECT_ID('[tb]') IS NOT NULL DROP TABLE [tb] GO CREATE TABLE [tb]([a] NVARCHAR(10),[b] INT,[c] INT,[d] INT) INSERT [tb] SELECT 'A',1,11,111 UNION ALL SELECT 'B',2,22,222 UNION ALL SELECT 'C',3,33,333 UNION ALL SELECT 'C',4,44,444 UNION ALL SELECT 'B',5,55,555 UNION ALL SELECT 'B',6,66,666 UNION ALL SELECT 'A',7,77,777 GO --SELECT * FROM [tb]-->SQL查询如下: select a,SUM(b) b, c=STUFF((select ','+ltrim(c) from tb where a=t.a for xml path('')),1,1,''), d=MAX(d) from tb t group by a /* a b c d A 8 11,77 777 B 13 22,55,66 666 C 7 33,44 444 */
以上2005 如果是2000自己写函数 具体不写了-- 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
合并列值 --******************************************************************************************* 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 (2 row(s) affected) */ drop table tb
好吧,我补充完: /*------------------------------------------------------------------ -- Author : htl258(Tony) -- Date : 2010-04-13 11:15:13 -- Version: Microsoft SQL Server 2008 (RTM) - 10.0.1600.22 (Intel X86) Jul 9 2008 14:43:34 Copyright (c) 1988-2008 Microsoft Corporation Developer Edition on Windows NT 5.1 <X86> (Build 2600: Service Pack 3)------------------------------------------------------------------*/ --> 生成测试数据表:tbIF OBJECT_ID('[tb]') IS NOT NULL DROP TABLE [tb] GO CREATE TABLE [tb]([a] NVARCHAR(10),[b] INT,[c] INT,[d] INT) INSERT [tb] SELECT 'A',1,11,111 UNION ALL SELECT 'B',2,22,222 UNION ALL SELECT 'C',3,33,333 UNION ALL SELECT 'C',4,44,444 UNION ALL SELECT 'B',5,55,555 UNION ALL SELECT 'B',6,66,666 UNION ALL SELECT 'A',7,77,777 GO --SELECT * FROM [tb]-->SQL查询如下: CREATE FUNCTION dbo.f_str(@a varchar(10)) RETURNS varchar(100) AS BEGIN DECLARE @r varchar(100) SELECT @r = isnull(@r + ',','') + ltrim(c) FROM tb WHERE a=@a RETURN @r END GO select a,SUM(b) b, c=dbo.f_str(a), d=MAX(d) from tb t group by a /* a b c d A 8 11,77 777 B 13 22,55,66 666 C 7 33,44 444 */
drop table tb
Go
Create table tb([序号] nvarchar(1),[数值1] int,[数值2] int,[数值3] int)
Insert tb
select N'A',1,11,111 union all
select N'B',2,22,222 union all
select N'C',3,33,333 union all
select N'C',4,44,444 union all
select N'B',5,55,555 union all
select N'B',6,66,666 union all
select N'A',7,77,777
Go
Select 序号,
sum(数值1)数值1,
stuff((select ','+ltrim([数值2])from tb where [序号]=t.[序号] for xml path('')),1,1,''),
max([数值3])[数值3]
from tb t
group by 序号
/*------------------------------------------------------------------
-- Author : htl258(Tony)
-- Date : 2010-04-13 11:15:13
-- Version: Microsoft SQL Server 2008 (RTM) - 10.0.1600.22 (Intel X86)
Jul 9 2008 14:43:34
Copyright (c) 1988-2008 Microsoft Corporation
Developer Edition on Windows NT 5.1 <X86> (Build 2600: Service Pack 3)------------------------------------------------------------------*/
--> 生成测试数据表:tbIF OBJECT_ID('[tb]') IS NOT NULL
DROP TABLE [tb]
GO
CREATE TABLE [tb]([a] NVARCHAR(10),[b] INT,[c] INT,[d] INT)
INSERT [tb]
SELECT 'A',1,11,111 UNION ALL
SELECT 'B',2,22,222 UNION ALL
SELECT 'C',3,33,333 UNION ALL
SELECT 'C',4,44,444 UNION ALL
SELECT 'B',5,55,555 UNION ALL
SELECT 'B',6,66,666 UNION ALL
SELECT 'A',7,77,777
GO
--SELECT * FROM [tb]-->SQL查询如下:
select a,SUM(b) b,
c=STUFF((select ','+ltrim(c) from tb where a=t.a for xml path('')),1,1,''),
d=MAX(d)
from tb t
group by a
/*
a b c d
A 8 11,77 777
B 13 22,55,66 666
C 7 33,44 444
*/
如果是2000自己写函数 具体不写了--
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
--*******************************************************************************************
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 (2 row(s) affected) */ drop table tb
/*------------------------------------------------------------------
-- Author : htl258(Tony)
-- Date : 2010-04-13 11:15:13
-- Version: Microsoft SQL Server 2008 (RTM) - 10.0.1600.22 (Intel X86)
Jul 9 2008 14:43:34
Copyright (c) 1988-2008 Microsoft Corporation
Developer Edition on Windows NT 5.1 <X86> (Build 2600: Service Pack 3)------------------------------------------------------------------*/
--> 生成测试数据表:tbIF OBJECT_ID('[tb]') IS NOT NULL
DROP TABLE [tb]
GO
CREATE TABLE [tb]([a] NVARCHAR(10),[b] INT,[c] INT,[d] INT)
INSERT [tb]
SELECT 'A',1,11,111 UNION ALL
SELECT 'B',2,22,222 UNION ALL
SELECT 'C',3,33,333 UNION ALL
SELECT 'C',4,44,444 UNION ALL
SELECT 'B',5,55,555 UNION ALL
SELECT 'B',6,66,666 UNION ALL
SELECT 'A',7,77,777
GO
--SELECT * FROM [tb]-->SQL查询如下:
CREATE FUNCTION dbo.f_str(@a varchar(10))
RETURNS varchar(100)
AS
BEGIN
DECLARE @r varchar(100)
SELECT @r = isnull(@r + ',','') + ltrim(c)
FROM tb
WHERE a=@a
RETURN @r
END
GO
select a,SUM(b) b,
c=dbo.f_str(a),
d=MAX(d)
from tb t
group by a
/*
a b c d
A 8 11,77 777
B 13 22,55,66 666
C 7 33,44 444
*/