如下表A:
AID ANAME
001 A
002 B
003 C
004 D
005 E如下表B:
BID BNAME BNUM AID
1 CHEN 2 001
2 CHEN 1 003
3 WANG 1 005
4 WANG 4 004要求输出如下表(如果表A中增加一个006 F的话,那么下表就会自动增加F这列):
A B C D E
CHEN 2 0 1 0 0
WANG 0 0 0 4 1
AID ANAME
001 A
002 B
003 C
004 D
005 E如下表B:
BID BNAME BNUM AID
1 CHEN 2 001
2 CHEN 1 003
3 WANG 1 005
4 WANG 4 004要求输出如下表(如果表A中增加一个006 F的话,那么下表就会自动增加F这列):
A B C D E
CHEN 2 0 1 0 0
WANG 0 0 0 4 1
/******************************************************************************************************************************************************
以学生成绩为例子,比较形象易懂整理人:中国风(Roy)日期:2008.06.06
******************************************************************************************************************************************************/--1、行互列
--> --> (Roy)生成測試數據
if not object_id('Class') is 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]
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]
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]=sum([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
--> --> (Roy)生成測試數據
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(8 行受影响)
*/
参考
http://topic.csdn.net/u/20080614/17/22e73f33-f071-46dc-b9bf-321204b1656f.html层出不穷的行转列的问题养肥了很多人啊,哈哈
insert into ta select '001','a'
insert into ta select '002','b'
insert into ta select '003','c'
insert into ta select '004','d'
insert into ta select '005','e'create table tb(bid int,bname varchar(50),bnum int,aid varchar(50))
insert into tb select 1,'CHEN',2,'001'
insert into tb select 2,'CHEN',1,'003'
insert into tb select 3,'WANG',1,'005'
insert into tb select 4,'WANG',4,'004'declare @sql varchar(max)
select @sql=isnull(@sql+',','')+'max(case when b.aid='''+aid+''' then bnum else 0 end) as ['+aname+']'
from ta
exec('select bname,'+@sql+' from ta a join tb b on a.aid=b.aid group by b.bname')bname a b c d e
CHEN 2 0 1 0 0
WANG 0 0 0 4 1
(
AID varchar(10),
AName varchar(20)
)
insert into #A select '001','A'
union all select '002','B'
union all select '003','C'
union all select '004','D'
union all select '005','E'create table #B
(
BID int identity(1,1) primary key not null,
BName varchar(20),
BNum int,
AID varchar(10)
)
insert into #B select 'CHEN',2,'001'
union all select 'CHEN',1,'003'
union all select 'WANG',1,'005'
union all select 'WANG',4,'004' /* A B C D E
CHEN 2 0 1 0 0
WANG 0 0 0 4 1*/
select B.BName,
sum(case when A.AName='A' then B.BNum else 0 end) 'A',
sum(case when A.AName='B' then B.BNum else 0 end) 'B',
sum(case when A.AName='C' then B.BNum else 0 end) 'C',
sum(case when A.AName='D' then B.BNum else 0 end) 'D',
sum(case when A.AName='E' then B.BNum else 0 end) 'E'
from #B B join #A A on A.AID=B.AID group by B.BName
(
AID varchar(10),
AName varchar(20)
)
insert into #A select '001','A'
union all select '002','B'
union all select '003','C'
union all select '004','D'
union all select '005','E'create table #B
(
BID int identity(1,1) primary key not null,
BName varchar(20),
BNum int,
AID varchar(10)
)
insert into #B select 'CHEN',2,'001'
union all select 'CHEN',1,'003'
union all select 'WANG',1,'005'
union all select 'WANG',4,'004' /* A B C D E
CHEN 2 0 1 0 0
WANG 0 0 0 4 1*/
select B.BName,
sum(case when A.AName='A' then B.BNum else 0 end) 'A',
sum(case when A.AName='B' then B.BNum else 0 end) 'B',
sum(case when A.AName='C' then B.BNum else 0 end) 'C',
sum(case when A.AName='D' then B.BNum else 0 end) 'D',
sum(case when A.AName='E' then B.BNum else 0 end) 'E'
from #B B join #A A on A.AID=B.AID group by B.BName
Select @s=isnull(@s+',','')+quotename([Course]) from Class group by[Course]
exec('select * from Class pivot (max([Score]) for [Course] in('+@s+'))b')
有问题吧