数据库存储方式如下:shop prodoct sum datesshop1 pro1 10 20090911
shop1 pro2 5 20090911
shop1 pro3 5 20090911
shop2 pro1 10 20090911
shop2 pro2 5 20090911
shop3 pro1 5 20090911
......我想查询转换成如下格式:
shop pro1 pro2 pro3
shop1 10 5 5
shop2 10 5 0
shop3 5 0 0
......
谢谢
shop1 pro2 5 20090911
shop1 pro3 5 20090911
shop2 pro1 10 20090911
shop2 pro2 5 20090911
shop3 pro1 5 20090911
......我想查询转换成如下格式:
shop pro1 pro2 pro3
shop1 10 5 5
shop2 10 5 0
shop3 5 0 0
......
谢谢
解决方案 »
- Treeview动态绑定数据源
- 存储过程问题
- 将 varchar 值 'Qekkon' 转换为数据类型为 int 的列时发生语法错误。
- 想学asp.net 但不知从何入手,该从哪本书入手
- 【孟子E章】出的书叫什么名字啊?
- 数据文件锁死?
- DataGrid中点击超级链接列后,如何控制弹出窗口????/
- 请问我使用vb.net编写asp.net,但我居然在web服务控件中的command中只发现了属性页但没有看到事件方法页面啊!
- 错误: System.Exception: Exception decrypting. Decryption failed. 该项不适于在指定状态下使用!!!!
- 欢迎来改。
- asp.net 上传图片到服务器出错
- 何为熟悉.netframework2.0?
--> --> (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)
*/
shop varchar(20),
prodoct varchar(20),
[sum] int,
dates datetime
)
insert into tempTable select 'shop1', 'pro1', 10, '20090911'
insert into tempTable select 'shop1', 'pro2', 5, '20090911'
insert into tempTable select 'shop1', 'pro3', 5, '20090911'
insert into tempTable select 'shop2', 'pro1', 10, '20090911'
insert into tempTable select 'shop2', 'pro2', 5 , '20090911'
insert into tempTable select 'shop3', 'pro1', 5, '20090911'select * from tempTable
declare @sql varchar(5000)
select @sql=isnull(@sql+',','')+'isnull(max(case when prodoct='''+prodoct+''' then [sum] end),0) as ['+prodoct+']'
from tempTable group by prodoctexec('select shop,'+@sql+' from tempTable group by shop')
shop1 10 5 5
shop2 10 5 0
shop3 5 0 0
shop,isnull(pro1,0),isnull(pro2,0), isnull(pro3,0)
from
TableName
pivot
(max([sum]) for [product] in([pro1],[pro2],[pro3]))b
shop varchar(20),
prodoct varchar(20),
[sum] int,
dates varchar(20)
)
insert into tempTable select 'shop1', 'pro1', 10, '20090911'
insert into tempTable select 'shop1', 'pro2', 5, '20090911'
insert into tempTable select 'shop1', 'pro3', 5, '20090911'
insert into tempTable select 'shop2', 'pro1', 10, '20090911'
insert into tempTable select 'shop2', 'pro2', 5 , '20090911'
insert into tempTable select 'shop3', 'pro1', 5, '20090911'
insert into tempTable select 'shop3', 'pro2', 5, '20090912'select * from tempTable/*shop prodoct sum dates
shop1 pro1 10 20090911
shop1 pro2 5 20090911
shop1 pro3 5 20090911
shop2 pro1 10 20090911
shop2 pro2 5 20090911
shop3 pro1 5 20090911
shop3 pro2 5 20090912
*/create proc up_GetTempTableByDate
@date varchar(20)=''
as
declare @sql varchar(5000)
select @sql=isnull(@sql+',','')+'isnull(max(case when prodoct='''+prodoct+''' then [sum] end),0) as ['+prodoct+']'
from tempTable group by prodoctexec('select shop,'+@sql+' from tempTable where dates like ''%'+@date+'%'' group by shop')exec up_GetTempTableByDate
/*
shop pro1 pro2 pro3
shop1 10 5 5
shop2 10 5 0
shop3 5 5 0
*/
exec up_GetTempTableByDate '20090911'
/*
shop pro1 pro2 pro3
shop1 10 5 5
shop2 10 5 0
shop3 5 0 0
*/
把代码写在存储过程里,就可以在.net 中调用了
--> 我的淘宝:http://shop36766744.taobao.com/ if object_id('[TB]') is not null drop table [TB]
create table [TB]([shop] varchar(5),[prodoct] varchar(4),[sum] int,[dates] datetime)
insert [TB]
select 'shop1','pro1',10,'20090911' union all
select 'shop1','pro2',5,'20090911' union all
select 'shop1','pro3',5,'20090911' union all
select 'shop2','pro1',10,'20090911' union all
select 'shop2','pro2',5,'20090911' union all
select 'shop3','pro1',5,'20090911'
declare @s nvarchar(4000)
set @s=''
Select @s=@s+','+quotename([prodoct])+'=max(case when [prodoct]='+quotename([prodoct],'''')+' then [sum] else 0 end)'
from TB group by [prodoct]
exec('select [shop]'+@s+' from TB group by [shop]')
/*
shop pro1 pro2 pro3
----- ----------- ----------- -----------
shop1 10 5 5
shop2 10 5 0
shop3 5 0 0(3 行受影响)*/drop table [TB]
shop
,isnull(pro1,0)as 'pro1'
,isnull(pro2,0)as 'pro2'
, isnull(pro3,0)as 'pro3'
from
(select * from C where date like '%20090911%' )a
pivot
(max([sum]) for [product] in([pro1],[pro2],[pro3]))b
(
shop varchar(20),
prodoct varchar(20),
[sum] int,
dates datetime
)
insert into @tempTable select 'shop1','pro1',10,'20090911'
insert into @tempTable select 'shop1','pro2',5,'20090911'
insert into @tempTable select 'shop1','pro3',5,'20090911'
insert into @tempTable select 'shop2','pro1',10,'20090911'
insert into @tempTable select 'shop2','pro2',5,'20090911'
insert into @tempTable select 'shop3','pro1',5,'20090911'
select shop,
sum(case when prodoct='pro1' then [sum] else 0 end)'pro1',
sum(case when prodoct='pro2' then [sum] else 0 end)'pro2',
sum(case when prodoct='pro3' then [sum] else 0 end)'pro3'
from @tempTable group by shop
shop pro1 pro2 pro3
-------------------- ----------- ----------- -----------
shop1 10 5 5
shop2 10 5 0
shop3 5 0 0