code intime quantity
000005 2009-02-27 00:00:00.000 12.0000
000005 2009-02-28 00:00:00.000 13.0000
. . .
. . .
. . .
显示成:
code intime quantity intime quantity ......
000005 2009-02-27 00:00:00.000 12.0000 2009-02-28 00:00:00.000 13.0000 ......
多谢!
000005 2009-02-27 00:00:00.000 12.0000
000005 2009-02-28 00:00:00.000 13.0000
. . .
. . .
. . .
显示成:
code intime quantity intime quantity ......
000005 2009-02-27 00:00:00.000 12.0000 2009-02-28 00:00:00.000 13.0000 ......
多谢!
/*
标题:普通行列转换(version 2.0)
作者:爱新觉罗.毓华(十八年风雨,守得冰山雪莲花开)
时间:2008-03-09
地点:广东深圳
说明:普通行列转换(version 1.0)仅针对sql server 2000提供静态和动态写法,version 2.0增加sql server 2005的有关写法。问题:假设有张学生成绩表(tb)如下:
姓名 课程 分数
张三 语文 74
张三 数学 83
张三 物理 93
李四 语文 74
李四 数学 84
李四 物理 94
想变成(得到如下结果):
姓名 语文 数学 物理
---- ---- ---- ----
李四 74 84 94
张三 74 83 93
-------------------
*/create table tb(姓名 varchar(10) , 课程 varchar(10) , 分数 int)
insert into tb values('张三' , '语文' , 74)
insert into tb values('张三' , '数学' , 83)
insert into tb values('张三' , '物理' , 93)
insert into tb values('李四' , '语文' , 74)
insert into tb values('李四' , '数学' , 84)
insert into tb values('李四' , '物理' , 94)
go--SQL SERVER 2000 静态SQL,指课程只有语文、数学、物理这三门课程。(以下同)
select 姓名 as 姓名 ,
max(case 课程 when '语文' then 分数 else 0 end) 语文,
max(case 课程 when '数学' then 分数 else 0 end) 数学,
max(case 课程 when '物理' then 分数 else 0 end) 物理
from tb
group by 姓名--SQL SERVER 2000 动态SQL,指课程不止语文、数学、物理这三门课程。(以下同)
declare @sql varchar(8000)
set @sql = 'select 姓名 '
select @sql = @sql + ' , max(case 课程 when ''' + 课程 + ''' then 分数 else 0 end) [' + 课程 + ']'
from (select distinct 课程 from tb) as a
set @sql = @sql + ' from tb group by 姓名'
exec(@sql) --SQL SERVER 2005 静态SQL。
select * from (select * from tb) a pivot (max(分数) for 课程 in (语文,数学,物理)) b--SQL SERVER 2005 动态SQL。
declare @sql varchar(8000)
select @sql = isnull(@sql + '],[' , '') + 课程 from tb group by 课程
set @sql = '[' + @sql + ']'
exec ('select * from (select * from tb) a pivot (max(分数) for 课程 in (' + @sql + ')) b')---------------------------------/*
问题:在上述结果的基础上加平均分,总分,得到如下结果:
姓名 语文 数学 物理 平均分 总分
---- ---- ---- ---- ------ ----
李四 74 84 94 84.00 252
张三 74 83 93 83.33 250
*/--SQL SERVER 2000 静态SQL。
select 姓名 姓名,
max(case 课程 when '语文' then 分数 else 0 end) 语文,
max(case 课程 when '数学' then 分数 else 0 end) 数学,
max(case 课程 when '物理' then 分数 else 0 end) 物理,
cast(avg(分数*1.0) as decimal(18,2)) 平均分,
sum(分数) 总分
from tb
group by 姓名--SQL SERVER 2000 动态SQL。
declare @sql varchar(8000)
set @sql = 'select 姓名 '
select @sql = @sql + ' , max(case 课程 when ''' + 课程 + ''' then 分数 else 0 end) [' + 课程 + ']'
from (select distinct 课程 from tb) as a
set @sql = @sql + ' , cast(avg(分数*1.0) as decimal(18,2)) 平均分 , sum(分数) 总分 from tb group by 姓名'
exec(@sql) --SQL SERVER 2005 静态SQL。
select m.* , n.平均分 , n.总分 from
(select * from (select * from tb) a pivot (max(分数) for 课程 in (语文,数学,物理)) b) m,
(select 姓名 , cast(avg(分数*1.0) as decimal(18,2)) 平均分 , sum(分数) 总分 from tb group by 姓名) n
where m.姓名 = n.姓名--SQL SERVER 2005 动态SQL。
declare @sql varchar(8000)
select @sql = isnull(@sql + ',' , '') + 课程 from tb group by 课程
exec ('select m.* , n.平均分 , n.总分 from
(select * from (select * from tb) a pivot (max(分数) for 课程 in (' + @sql + ')) b) m ,
(select 姓名 , cast(avg(分数*1.0) as decimal(18,2)) 平均分 , sum(分数) 总分 from tb group by 姓名) n
where m.姓名 = n.姓名')drop table tb
INSERT @TB
SELECT '000005', '2009-02-27 00:00:00.000', 12.0000 UNION ALL
SELECT '000005', '2009-02-28 00:00:00.000', 13.0000 UNION ALL
SELECT '000006', '2009-02-28 00:00:00.000', 15.0000
SELECT *,ID=ROW_NUMBER() OVER (PARTITION BY code ORDER BY GETDATE())
INTO TB
FROM @TB DECLARE @STR VARCHAR(8000)
SET @STR=''
SELECT @STR=@STR+','+'MAX(CASE WHEN ID='+RTRIM(ID)+' THEN [intime] END) AS [intime],
MAX(CASE WHEN ID='+RTRIM(ID)+' THEN [intime] END) AS [quantity]'
FROM TB
GROUP BY IDEXEC('SELECT code'+@STR+' FROM TB GROUP BY code')
DROP TABLE TB
/*
code intime quantity intime quantity
------ ----------------------- ----------------------- ----------------------- -----------------------
000005 2009-02-27 00:00:00.000 2009-02-27 00:00:00.000 2009-02-28 00:00:00.000 2009-02-28 00:00:00.000
000006 2009-02-28 00:00:00.000 2009-02-28 00:00:00.000 NULL NULL
*/
DECLARE @TB TABLE([code] VARCHAR(6), [intime] DATETIME, [quantity] DECIMAL(10,4))
INSERT @TB
SELECT '000005', '2009-02-27 00:00:00.000', 12.0000 UNION ALL
SELECT '000005', '2009-02-28 00:00:00.000', 13.0000 UNION ALL
SELECT '000006', '2009-02-28 00:00:00.000', 15.0000
SELECT *,ID=ROW_NUMBER() OVER (PARTITION BY code ORDER BY GETDATE())
INTO TB
FROM @TB DECLARE @STR VARCHAR(8000)
SET @STR=''
SELECT @STR=@STR+','+'MAX(CASE WHEN ID='+RTRIM(ID)+' THEN [intime] END) AS [intime],
MAX(CASE WHEN ID='+RTRIM(ID)+' THEN [quantity] END) AS [quantity]'
FROM TB
GROUP BY IDEXEC('SELECT code'+@STR+' FROM TB GROUP BY code')
DROP TABLE TB
/*
code intime quantity intime quantity
------ ----------------------- --------------------------------------- ----------------------- ---------------------------------------
000005 2009-02-27 00:00:00.000 12.0000 2009-02-28 00:00:00.000 13.0000
000006 2009-02-28 00:00:00.000 15.0000 NULL NULL
*/
INSERT @TB
SELECT '000005', '2009-02-27 00:00:00.000', 12.0000 UNION ALL
SELECT '000005', '2009-02-28 00:00:00.000', 13.0000 UNION ALL
SELECT '000006', '2009-02-28 00:00:00.000', 15.0000
SELECT *,ID=ROW_NUMBER() OVER (PARTITION BY code ORDER BY GETDATE())
INTO TB
FROM @TB DECLARE @STR VARCHAR(8000)
SET @STR=''
SELECT @STR=@STR+','+'MAX(CASE WHEN ID='+RTRIM(ID)+' THEN [intime] END) AS [intime],
MAX(CASE WHEN ID='+RTRIM(ID)+' THEN [quantity] END) AS [quantity]'
FROM TB
GROUP BY IDEXEC('SELECT code'+@STR+' FROM TB GROUP BY code')
DROP TABLE TB
/*
code intime quantity intime quantity
------ ----------------------- --------------------------------------- ----------------------- ---------------------------------------
000005 2009-02-27 00:00:00.000 12.0000 2009-02-28 00:00:00.000 13.0000
000006 2009-02-28 00:00:00.000 15.0000 NULL NULL
*/
drop table tb
go
create table tb(code varchar(50),intime datetime,quantity decimal(18,4))
insert into tb select '000005','2009-03-27',12.0000
insert into tb select '000005','2009-03-28',13.0000
insert into tb select '000006','2009-03-29',14.0000
insert into tb select '000006','2009-03-30',15.0000
godeclare @sql varchar(max)
select @sql=isnull(@sql+',','')+'max(case when px='''+ltrim(px)+''' then intime else null end) as intime,
max(case when px='''+ltrim(px)+''' then quantity else null end) as quantity'
from (select *,row_number() over(partition by code order by code) as px
from tb)t group by pxexec('select code,'+@sql+' from (select *,row_number() over(partition by code order by code) as px
from tb)t group by code')code intime quantity intime quantity
000005 2009-03-27 00:00:00.000 12.0000 2009-03-28 00:00:00.000 13.0000
000006 2009-03-29 00:00:00.000 14.0000 2009-03-30 00:00:00.000 15.0000
INSERT @TB
SELECT '000005', '2009-02-27 00:00:00.000', 12.0000 UNION ALL
SELECT '000005', '2009-02-28 00:00:00.000', 13.0000 UNION ALL
SELECT '000006', '2009-02-28 00:00:00.000', 15.0000
SELECT *,ID=ROW_NUMBER() OVER (PARTITION BY code ORDER BY GETDATE())
INTO TB
FROM @TB DECLARE @STR VARCHAR(8000)
SET @STR=''
SELECT @STR=@STR+','+'MAX(CASE WHEN ID='+RTRIM(ID)+' THEN isnull([intime],'norecord') END) AS [intime],
MAX(CASE WHEN ID='+RTRIM(ID)+' THEN isnull([quantity],0) END) AS [quantity]'
FROM TB
GROUP BY IDEXEC('SELECT code'+@STR+' FROM TB GROUP BY code')
DROP TABLE TB
在csdyyr的基础上加了一个ISNULL函数,不知道可不可以。