declare @output varchar(8000) select @output = coalesce(@output+',', '') + col from table print @output
create table tb( col varchar(1)) insert into tb values('H') insert into tb values('S') insert into tb values('H') insert into tb values('A') godeclare @output varchar(8000) select @output = coalesce(@output+',', '') + col from tbprint @output drop table tb /* H,S,H,A */
declare @output varchar(8000) select @output = isnull(@output+',', '') + col from table print @output
SQL2000下的交叉表 2005有一个固定函数 本人没用2005 好像是coalesce --示例数据: CREATE TABLE tb(ID varchar(10),NGNO char(1),QTY int) INSERT tb SELECT '200505','A',10 UNION ALL SELECT '200505','B',20 UNION ALL SELECT '200505','C',30 UNION ALL SELECT '200506','B',10 UNION ALL SELECT '200506','C',20 UNION ALL SELECT '200506','D',30 UNION ALL SELECT '200506','E',40 GO交叉数据报表要求1: 按ID列分组,将NGNO列水平显示为多列,但每列由NGNO的大小顺序决定,而不是由NGNO的值决定,对于示例数据,最终的结果要求如下:ID col1 col2 col3 col4 ---------- ------- ------- ------- ------- 200505 A(10) B(20) C(30) 200506 B(10) C(20) D(30) E(40)--实现代码 DECLARE @i varchar(10),@s nvarchar(4000) SELECT TOP 1 @s='',@I=COUNT(*) FROM tb GROUP BY ID ORDER BY COUNT(*) DESC WHILE @i>0 SELECT @s=N',col'+@i +N'=ISNULL(MAX(CASE GID WHEN '+@i +N' THEN QTY END),'''')'+@s, @i=@i-1 EXEC(N'SELECT ID'+@s+N' FROM( SELECT ID,QTY=RTRIM(NGNO)+QUOTENAME(QTY,N''()''), GID=(SELECT COUNT(DISTINCT NGNO) FROM TB WHERE ID=a.ID AND NGNO<=a.NGNO) FROM tb a )a GROUP BY ID') GO交叉数据报表要求2: 按ID列分组,将NGNO及QTY列合并显示在一个列中,最终的结果要求如下: ID Value ---------- ----------------------------------------------- 200505 A(10) B(20) C(30) 200506 B(10) C(20) D(30) E(40)(所影响的行数为 2 行)--实现处理的函数 CREATE FUNCTION f_Str(@ID varchar(10)) RETURNS varchar(8000) AS BEGIN DECLARE @r varchar(8000) SET @r='' SELECT @r=@r+SPACE(8)+RTRIM(NGNO)+QUOTENAME(QTY,'()') FROM tb WHERE ID=@ID RETURN(STUFF(@r,1,8,'')) END GO--调用实现查询 SELECT ID,Value=dbo.f_Str(ID) FROM tb GROUP BY ID GO
select @output = coalesce(@output+',', '') + col from table
print @output
insert into tb values('H')
insert into tb values('S')
insert into tb values('H')
insert into tb values('A')
godeclare @output varchar(8000)
select @output = coalesce(@output+',', '') + col from tbprint @output
drop table tb /*
H,S,H,A
*/
select @output = isnull(@output+',', '') + col from table
print @output
--示例数据:
CREATE TABLE tb(ID varchar(10),NGNO char(1),QTY int)
INSERT tb SELECT '200505','A',10
UNION ALL SELECT '200505','B',20
UNION ALL SELECT '200505','C',30
UNION ALL SELECT '200506','B',10
UNION ALL SELECT '200506','C',20
UNION ALL SELECT '200506','D',30
UNION ALL SELECT '200506','E',40
GO交叉数据报表要求1:
按ID列分组,将NGNO列水平显示为多列,但每列由NGNO的大小顺序决定,而不是由NGNO的值决定,对于示例数据,最终的结果要求如下:ID col1 col2 col3 col4
---------- ------- ------- ------- -------
200505 A(10) B(20) C(30)
200506 B(10) C(20) D(30) E(40)--实现代码
DECLARE @i varchar(10),@s nvarchar(4000)
SELECT TOP 1 @s='',@I=COUNT(*) FROM tb
GROUP BY ID
ORDER BY COUNT(*) DESC
WHILE @i>0
SELECT @s=N',col'+@i
+N'=ISNULL(MAX(CASE GID WHEN '+@i
+N' THEN QTY END),'''')'+@s,
@i=@i-1
EXEC(N'SELECT ID'+@s+N'
FROM(
SELECT ID,QTY=RTRIM(NGNO)+QUOTENAME(QTY,N''()''),
GID=(SELECT COUNT(DISTINCT NGNO) FROM TB WHERE ID=a.ID AND NGNO<=a.NGNO)
FROM tb a
)a GROUP BY ID')
GO交叉数据报表要求2:
按ID列分组,将NGNO及QTY列合并显示在一个列中,最终的结果要求如下: ID Value
---------- -----------------------------------------------
200505 A(10) B(20) C(30)
200506 B(10) C(20) D(30) E(40)(所影响的行数为 2 行)--实现处理的函数
CREATE FUNCTION f_Str(@ID varchar(10))
RETURNS varchar(8000)
AS
BEGIN
DECLARE @r varchar(8000)
SET @r=''
SELECT @r=@r+SPACE(8)+RTRIM(NGNO)+QUOTENAME(QTY,'()')
FROM tb
WHERE ID=@ID
RETURN(STUFF(@r,1,8,''))
END
GO--调用实现查询
SELECT ID,Value=dbo.f_Str(ID) FROM tb GROUP BY ID
GO