EXEC('select [pid]'+@s+' from a group by [pid]') 想视图也可以 ,不过视图要不断修改。 EXEC('alter view V_TEST as select [pid]'+@s+' from a group by [pid]')
这是我的代码DECLARE @s NVARCHAR(4000) SET @s = 'pid' SELECT @s = @s + ',' + QUOTENAME(fieldname) + '=max(case when [fieldname]=' + QUOTENAME(fieldname, '''') + ' then [VALUE] else ''0'' end)' FROM a group by pid,fieldname EXEC('select '+@s+' from a group by pid')
USE tempdb GO IF OBJECT_ID('OO','U') IS NOT NULL DROP TABLE OO GO SELECT * INTO OO FROM (VALUES (N'张三',N'语文',78.00), (N'张三',N'数学',87.00), (N'张三',N'英语',82.00), (N'张三',N'物理',90.00), (N'李四',N'语文',65.00), (N'李四',N'数学',77.00), (N'李四',N'英语',65.00), (N'李四',N'物理',85.00))A(姓名,课程,得分) DECLARE @X NVARCHAR(MAX) SELECT @X = '['+ STUFF ((SELECT '['+ 课程 +'],' FROM (SELECT DISTINCT 课程 FROM OO)A FOR XML PATH('')),1,1,'') SET @X=SUBSTRING(@X,1,LEN(@X)-1) --PRINT @X SET @X= N'SELECT A.*,ISNULL(CAST(B.个人总分 AS NVARCHAR(10)),'' —— '')个人总分,ISNULL(CAST(B.个人平均分 AS NVARCHAR(10)),'' —— '')个人平均分 FROM( SELECT * FROM OO PIVOT (MAX(得分) FOR 课程 IN ('+@X+N'))A UNION ALL SELECT * FROM ( SELECT N''班级平均分''班级, 课程, CAST(AVG(得分) AS NUMERIC(5,2))平均分 FROM OO GROUP BY 课程)A PIVOT (MAX(平均分) FOR 课程 IN ('+@X+N'))X )A LEFT JOIN ( SELECT 姓名,SUM(得分)个人总分,CAST(AVG(得分) AS NUMERIC(5,2)) 个人平均分 FROM OO GROUP BY 姓名 )B ON A.姓名 =B.姓名' EXEC(@X) 仅作参考。
--行列互转 --摘自中国风博客,引用请标明内容来源 --1、行换列 if object_id('Class') is not null drop table Class Go Create table Class( [Student] nvarchar(2), [Course] nvarchar(2), [Score] int) Insert Class select N'张三',N'语文',78 union all select N'张三',N'数学',87 union all select N'张三',N'英语',82 union all select N'张三',N'物理',90 union all select N'李四',N'语文',65 union all select N'李四',N'数学',77 union all select N'李四',N'英语',65 union all select N'李四',N'物理',85 Go--2000方法: --动态: declare @s nvarchar(4000) set @s='' Select @s=@s+','+quotename([Course])+'=max(case when [Course]='
+quotename([Course],'''')+' then [Score] else 0 end)' from Class group by[Course] --select @s exec('select [Student]'+@s+' from Class group by [Student]') --生成静态: select [Student], [数学]=max(case when [Course]='数学' then [Score] else 0 end), [物理]=max(case when [Course]='物理' then [Score] else 0 end), [英语]=max(case when [Course]='英语' then [Score] else 0 end), [语文]=max(case when [Course]='语文' then [Score] else 0 end) from Class group by [Student] GO --动态:declare @s nvarchar(4000) Select @s=isnull(@s+',','')+quotename([Course]) from Class group by[Course] select @s exec('select * from Class pivot (max([Score]) for [Course] in('+@s+'))b')--生成静态: select * from Class pivot (max([Score]) for [Course] in([数学],[物理],[英语],[语文]))b--生成格式: /* Student 数学 物理 英语 语文 ------- ----------- ----------- ----------- ----------- 李四 77 85 65 65 张三 87 90 82 78(2 行受影响) */go --加上总成绩(学科平均分)--2000方法: --动态:declare @s nvarchar(4000) set @s='' Select @s=@s+','+quotename([Course])+'=max(case when [Course]='+quotename([Course],'''')+'then [Score] else 0 end)' from Class group by[Course] exec('select [Student]'+@s+',[总成绩]=sum([Score]) from Class group by [Student]')--加多一列(学科平均分用avg([Score]))生成动态:select [Student], [数学]=max(case when [Course]='数学' then [Score] else 0 end), [物理]=max(case when [Course]='物理' then [Score] else 0 end), [英语]=max(case when [Course]='英语' then [Score] else 0 end), [语文]=max(case when [Course]='语文' then [Score] else 0 end), [总成绩]=([Score]) --加多一列(学科平均分用avg([Score])) from Class group by [Student]go--2005方法:动态:declare @s nvarchar(4000) Select @s=isnull(@s+',','')+quotename([Course]) from Class group by[Course] --isnull(@s+',','') 去掉字符串@s中第一个逗号exec('select [Student],'+@s+',[总成绩] from (select *,[总成绩]=sum([Score])over(partition by [Student]) from Class) a pivot (max([Score]) for [Course] in('+@s+'))b ')--生成静态:select [Student],[数学],[物理],[英语],[语文],[总成绩] from (select *,[总成绩]=sum([Score])over(partition by [Student]) from Class) a --平均分时用avg([Score]) pivot (max([Score]) for [Course] in([数学],[物理],[英语],[语文]))b 生成格式:/* Student 数学 物理 英语 语文 总成绩 ------- ----------- ----------- ----------- ----------- ----------- 李四 77 85 65 65 292 张三 87 90 82 78 337(2 行受影响) */go--2、列转行
if not object_id('Class') is null drop table Class Go Create table Class([Student] nvarchar(2),[数学] int,[物理] int,[英语] int,[语文] int) Insert Class select N'李四',77,85,65,65 union all select N'张三',87,90,82,78 Go--2000:动态:declare @s nvarchar(4000) select @s=isnull(@s+' union all ','')+'select [Student],[Course]='+quotename(Name,'''')--isnull(@s+' union all ','') 去掉字符串@s中第一个union all +',[Score]='+quotename(Name)+' from Class' from syscolumns where ID=object_id('Class') and Name not in('Student')--排除不转换的列 order by Colid exec('select * from ('+@s+')t order by [Student],[Course]')--增加一个排序生成静态: select * from (select [Student],[Course]='数学',[Score]=[数学] from Class union all select [Student],[Course]='物理',[Score]=[物理] from Class union all select [Student],[Course]='英语',[Score]=[英语] from Class union all select [Student],[Course]='语文',[Score]=[语文] from Class)t order by [Student],[Course]go --2005:动态:declare @s nvarchar(4000) select @s=isnull(@s+',','')+quotename(Name) from syscolumns where ID=object_id('Class') and Name not in('Student') order by Colid exec('select Student,[Course],[Score] from Class unpivot ([Score] for [Course] in('+@s+'))b')go select Student,[Course],[Score] from Class unpivot ([Score] for [Course] in([数学],[物理],[英语],[语文]))b 生成格式: /* Student Course Score ------- ------- ----------- 李四 数学 77 李四 物理 85 李四 英语 65 李四 语文 65 张三 数学 87 张三 物理 90 张三 英语 82 张三 语文 78 */
--CREATE TABLE a (ID INT , pid INT , fieldname VARCHAR(10), VALUE VARCHAR(10))
--INSERT INTO a
--SELECT 1 , 1 , 'field1', 'aaaaa'
--UNION ALL
--SELECT 2 , 1 , 'field2' , 'bbbbb'
--UNION ALL
--SELECT 3 , 2 , 'field1' , 'ccccc'
--UNION ALL
--SELECT 4 , 2 , 'field2' , 'ddddd
DECLARE @s NVARCHAR(4000)
SET @s = ''
SELECT @s = @s + ',' + QUOTENAME(fieldname) + '=max(case when [fieldname]='
+ QUOTENAME(fieldname, '''') + ' then [VALUE] else ''0'' end)'
FROM a
GROUP BY
EXEC('select [pid]'+@s+' from a group by [pid]') /*
pid field1 field2
----------- ---------- ----------
1 aaaaa bbbbb
2 ccccc ddddd
*/
SELECT pid,[field1],[field2]
FROM A
PIVOT ( max(value) FOR fieldname in([field1],[field2]))
AS p
group by pid,[field1],[field2] 这样来搞一下吧。
as
我那段代码然后试试。不过也没必要搞视图吧
在GROUP BY 加上了pid,fieldname后,结果字段会重复显示,有4行的话,字段就是显示4个字段,这是怎么回事?
pid field1 field2 field1 field2
1 aaaaa bbbbb aaaaa bbbbb
2 ccccc ddddd ccccc ddddd
想视图也可以 ,不过视图要不断修改。
EXEC('alter view V_TEST as select [pid]'+@s+' from a group by [pid]')
SET @s = 'pid'
SELECT @s = @s + ',' + QUOTENAME(fieldname) + '=max(case when [fieldname]='
+ QUOTENAME(fieldname, '''') + ' then [VALUE] else ''0'' end)'
FROM a
group by pid,fieldname
EXEC('select '+@s+' from a group by pid')
GO
IF OBJECT_ID('OO','U') IS NOT NULL DROP TABLE OO
GO
SELECT * INTO OO FROM (VALUES
(N'张三',N'语文',78.00),
(N'张三',N'数学',87.00),
(N'张三',N'英语',82.00),
(N'张三',N'物理',90.00),
(N'李四',N'语文',65.00),
(N'李四',N'数学',77.00),
(N'李四',N'英语',65.00),
(N'李四',N'物理',85.00))A(姓名,课程,得分)
DECLARE @X NVARCHAR(MAX)
SELECT
@X = '['+
STUFF ((SELECT '['+ 课程 +'],' FROM (SELECT DISTINCT 课程 FROM OO)A FOR XML PATH('')),1,1,'')
SET @X=SUBSTRING(@X,1,LEN(@X)-1)
--PRINT @X
SET @X=
N'SELECT A.*,ISNULL(CAST(B.个人总分 AS NVARCHAR(10)),'' —— '')个人总分,ISNULL(CAST(B.个人平均分 AS NVARCHAR(10)),'' —— '')个人平均分 FROM(
SELECT * FROM OO PIVOT (MAX(得分) FOR 课程 IN ('+@X+N'))A
UNION ALL
SELECT * FROM (
SELECT N''班级平均分''班级, 课程, CAST(AVG(得分) AS NUMERIC(5,2))平均分 FROM OO GROUP BY 课程)A
PIVOT (MAX(平均分) FOR 课程 IN ('+@X+N'))X
)A
LEFT JOIN (
SELECT 姓名,SUM(得分)个人总分,CAST(AVG(得分) AS NUMERIC(5,2)) 个人平均分 FROM OO GROUP BY 姓名
)B
ON A.姓名 =B.姓名'
EXEC(@X)
仅作参考。
--摘自中国风博客,引用请标明内容来源
--1、行换列
if object_id('Class') is not null
drop table Class
Go
Create table Class(
[Student] nvarchar(2),
[Course] nvarchar(2),
[Score] int)
Insert Class
select N'张三',N'语文',78 union all
select N'张三',N'数学',87 union all
select N'张三',N'英语',82 union all
select N'张三',N'物理',90 union all
select N'李四',N'语文',65 union all
select N'李四',N'数学',77 union all
select N'李四',N'英语',65 union all
select N'李四',N'物理',85
Go--2000方法:
--动态:
declare @s nvarchar(4000)
set @s=''
Select @s=@s+','+quotename([Course])+'=max(case when [Course]='
+quotename([Course],'''')+' then [Score] else 0 end)'
from
Class group by[Course]
--select @s
exec('select [Student]'+@s+' from Class group by [Student]')
--生成静态:
select
[Student],
[数学]=max(case when [Course]='数学' then [Score] else 0 end),
[物理]=max(case when [Course]='物理' then [Score] else 0 end),
[英语]=max(case when [Course]='英语' then [Score] else 0 end),
[语文]=max(case when [Course]='语文' then [Score] else 0 end)
from
Class
group by [Student]
GO
--动态:declare @s nvarchar(4000)
Select @s=isnull(@s+',','')+quotename([Course]) from Class group by[Course]
select @s
exec('select * from Class pivot (max([Score]) for [Course] in('+@s+'))b')--生成静态:
select *
from
Class
pivot
(max([Score]) for [Course] in([数学],[物理],[英语],[语文]))b--生成格式:
/*
Student 数学 物理 英语 语文
------- ----------- ----------- ----------- -----------
李四 77 85 65 65
张三 87 90 82 78(2 行受影响)
*/go
--加上总成绩(学科平均分)--2000方法:
--动态:declare @s nvarchar(4000)
set @s=''
Select @s=@s+','+quotename([Course])+'=max(case when [Course]='+quotename([Course],'''')+'then [Score] else 0 end)'
from Class group by[Course]
exec('select [Student]'+@s+',[总成绩]=sum([Score]) from Class group by [Student]')--加多一列(学科平均分用avg([Score]))生成动态:select
[Student],
[数学]=max(case when [Course]='数学' then [Score] else 0 end),
[物理]=max(case when [Course]='物理' then [Score] else 0 end),
[英语]=max(case when [Course]='英语' then [Score] else 0 end),
[语文]=max(case when [Course]='语文' then [Score] else 0 end),
[总成绩]=([Score]) --加多一列(学科平均分用avg([Score]))
from
Class
group by [Student]go--2005方法:动态:declare @s nvarchar(4000)
Select @s=isnull(@s+',','')+quotename([Course]) from Class group by[Course]
--isnull(@s+',','') 去掉字符串@s中第一个逗号exec('select [Student],'+@s+',[总成绩] from (select *,[总成绩]=sum([Score])over(partition by [Student]) from Class) a
pivot (max([Score]) for [Course] in('+@s+'))b ')--生成静态:select
[Student],[数学],[物理],[英语],[语文],[总成绩]
from
(select *,[总成绩]=sum([Score])over(partition by [Student]) from Class) a --平均分时用avg([Score])
pivot
(max([Score]) for [Course] in([数学],[物理],[英语],[语文]))b 生成格式:/*
Student 数学 物理 英语 语文 总成绩
------- ----------- ----------- ----------- ----------- -----------
李四 77 85 65 65 292
张三 87 90 82 78 337(2 行受影响)
*/go--2、列转行
if not object_id('Class') is null
drop table Class
Go
Create table Class([Student] nvarchar(2),[数学] int,[物理] int,[英语] int,[语文] int)
Insert Class
select N'李四',77,85,65,65 union all
select N'张三',87,90,82,78
Go--2000:动态:declare @s nvarchar(4000)
select @s=isnull(@s+' union all ','')+'select [Student],[Course]='+quotename(Name,'''')--isnull(@s+' union all ','') 去掉字符串@s中第一个union all
+',[Score]='+quotename(Name)+' from Class'
from syscolumns where ID=object_id('Class') and Name not in('Student')--排除不转换的列
order by Colid
exec('select * from ('+@s+')t order by [Student],[Course]')--增加一个排序生成静态:
select *
from (select [Student],[Course]='数学',[Score]=[数学] from Class union all
select [Student],[Course]='物理',[Score]=[物理] from Class union all
select [Student],[Course]='英语',[Score]=[英语] from Class union all
select [Student],[Course]='语文',[Score]=[语文] from Class)t
order by [Student],[Course]go
--2005:动态:declare @s nvarchar(4000)
select @s=isnull(@s+',','')+quotename(Name)
from syscolumns where ID=object_id('Class') and Name not in('Student')
order by Colid
exec('select Student,[Course],[Score] from Class unpivot ([Score] for [Course] in('+@s+'))b')go
select
Student,[Course],[Score]
from
Class
unpivot
([Score] for [Course] in([数学],[物理],[英语],[语文]))b
生成格式:
/*
Student Course Score
------- ------- -----------
李四 数学 77
李四 物理 85
李四 英语 65
李四 语文 65
张三 数学 87
张三 物理 90
张三 英语 82
张三 语文 78
*/