先列转行,再插入 /*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
declare @tn nvarchar(50) set @tn = 'table1' declare @sql nvarchar(255) declare @p1 nvarchar(255) declare @p2 nvarchar(255) declare @p3 nvarchar(255) declare @p4 nvarchar(255) declare @p5 nvarchar(255) declare @p6 nvarchar(255) declare @p7 nvarchar(255) declare @p8 nvarchar(255) declare @p9 nvarchar(255) set @p1 = '3' set @p1 = 'a' set @p1 = 'bc' set @p1 = 'd' set @p1 = 'e' set @p1 = 'f' set @p1 = 'g' set @p1 = 'gh' set @p1 = 'ye'set @sql = N'insert into '+@tn+'values('+@p1+','+@p2+','+@p3+','+@p4+','+@p5+','+@p6+','+@p7+','+@p8+','+@p9+')' exec sp_executesql @sql帮我看下,这个执行完成后,为什么没有数据插入到表中,谢谢!!
set @p1 = '3' set @p1 = 'a' set @p1 = 'bc' set @p1 = 'd' set @p1 = 'e' set @p1 = 'f' set @p1 = 'g' set @p1 = 'gh' set @p1 = 'ye'因为你这全是p1, 其他的p2 , p3,p4 .....你都没赋初值
8楼说的问题,我已经改过了,出现同样的问题 declare @tn nvarchar(50) set @tn = 'tablename' declare @sql nvarchar(255) declare @p1 nvarchar(255) declare @p2 nvarchar(255) declare @p3 nvarchar(255) declare @p4 nvarchar(255) declare @p5 nvarchar(255) declare @p6 nvarchar(255) declare @p7 nvarchar(255) declare @p8 nvarchar(255) declare @p9 nvarchar(255) set @p1 = '3' set @p2 = 'a' set @p3 = 'bc' set @p4 = 'd' set @p5 = 'e' set @p6 = 'f' set @p7 = 'g' set @p8 = 'gh' set @p9 = 'ye'set @sql = N'insert into '+@tn+' values('+@p1+','+@p2+','+@p3+','+@p4+','+@p5+','+@p6+','+@p7+','+@p8+','+@p9+')' exec(@sql)消息 128,级别 15,状态 1,第 1 行 在此上下文中不允许使用名称 "a"。有效表达式包括常量、常量表达式和变量(在某些上下文中)。不允许使用列名。
declare @tn nvarchar(50) set @tn = 'tablename' declare @sql nvarchar(255) declare @p1 nvarchar(255) declare @p2 nvarchar(255) declare @p3 nvarchar(255) declare @p4 nvarchar(255) declare @p5 nvarchar(255) declare @p6 nvarchar(255) declare @p7 nvarchar(255) declare @p8 nvarchar(255) declare @p9 nvarchar(255) set @p1 = '3' set @p2 = 'a' set @p3 = 'bc' set @p4 = 'd' set @p5 = 'e' set @p6 = 'f' set @p7 = 'g' set @p8 = 'gh' set @p9 = 'ye'set @sql='select '''+@p1+''' as col1,'''+@p2+''' as col2,'''+@p3+''' as col3,'''+@p4+''' as col4,'''+@p5+''' as col5,'''+@p6+''' as col6,'''+@p7+''' as col7,'''+@p8+''' as col8,'''+@p9+''' as col9 into '+@tn+'' exec(@sql) set @sql='select * from '+@tn+'' exec(@sql)--drop table tablename
/*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
set @tn = 'table1'
declare @sql nvarchar(255)
declare @p1 nvarchar(255)
declare @p2 nvarchar(255)
declare @p3 nvarchar(255)
declare @p4 nvarchar(255)
declare @p5 nvarchar(255)
declare @p6 nvarchar(255)
declare @p7 nvarchar(255)
declare @p8 nvarchar(255)
declare @p9 nvarchar(255)
set @p1 = '3'
set @p1 = 'a'
set @p1 = 'bc'
set @p1 = 'd'
set @p1 = 'e'
set @p1 = 'f'
set @p1 = 'g'
set @p1 = 'gh'
set @p1 = 'ye'set @sql = N'insert into '+@tn+'values('+@p1+','+@p2+','+@p3+','+@p4+','+@p5+','+@p6+','+@p7+','+@p8+','+@p9+')'
exec sp_executesql @sql帮我看下,这个执行完成后,为什么没有数据插入到表中,谢谢!!
set @p1 = 'a'
set @p1 = 'bc'
set @p1 = 'd'
set @p1 = 'e'
set @p1 = 'f'
set @p1 = 'g'
set @p1 = 'gh'
set @p1 = 'ye'因为你这全是p1, 其他的p2 , p3,p4 .....你都没赋初值
declare @tn nvarchar(50)
set @tn = 'tablename'
declare @sql nvarchar(255)
declare @p1 nvarchar(255)
declare @p2 nvarchar(255)
declare @p3 nvarchar(255)
declare @p4 nvarchar(255)
declare @p5 nvarchar(255)
declare @p6 nvarchar(255)
declare @p7 nvarchar(255)
declare @p8 nvarchar(255)
declare @p9 nvarchar(255)
set @p1 = '3'
set @p2 = 'a'
set @p3 = 'bc'
set @p4 = 'd'
set @p5 = 'e'
set @p6 = 'f'
set @p7 = 'g'
set @p8 = 'gh'
set @p9 = 'ye'set @sql = N'insert into '+@tn+' values('+@p1+','+@p2+','+@p3+','+@p4+','+@p5+','+@p6+','+@p7+','+@p8+','+@p9+')'
exec(@sql)消息 128,级别 15,状态 1,第 1 行
在此上下文中不允许使用名称 "a"。有效表达式包括常量、常量表达式和变量(在某些上下文中)。不允许使用列名。
declare @tn nvarchar(50)
set @tn = 'tablename'
declare @sql nvarchar(255)
declare @p1 nvarchar(255)
declare @p2 nvarchar(255)
declare @p3 nvarchar(255)
declare @p4 nvarchar(255)
declare @p5 nvarchar(255)
declare @p6 nvarchar(255)
declare @p7 nvarchar(255)
declare @p8 nvarchar(255)
declare @p9 nvarchar(255)
set @p1 = '3'
set @p2 = 'a'
set @p3 = 'bc'
set @p4 = 'd'
set @p5 = 'e'
set @p6 = 'f'
set @p7 = 'g'
set @p8 = 'gh'
set @p9 = 'ye'set @sql='select '''+@p1+''' as col1,'''+@p2+''' as col2,'''+@p3+''' as col3,'''+@p4+''' as col4,'''+@p5+''' as col5,'''+@p6+''' as col6,'''+@p7+''' as col7,'''+@p8+''' as col8,'''+@p9+''' as col9 into '+@tn+''
exec(@sql)
set @sql='select * from '+@tn+''
exec(@sql)--drop table tablename