有一表结构如下
id index xm xm1 xm2 hz
8 3 wdy 5.0 5.0 10.00
9 3 hzs 5.0 5.0 12.00
10 3 xjb 4.0 6.0 15.00
16 4 wdy 5.0 5.0 11.00
17 4 hzs 5.0 5.0 114.00
18 4 xjb 5.0 5.0 20.00
19 5 wdy 4.0 6.0 12.00
20 5 hzs 5.0 5.0 18.00
21 5 xjb 4.0 6.0 19.00
=====================================================================
现在要实现如下查询结果
index wdy hzs xjb
3 10.00 12.00 15.00
4 11.00 114.00 20.00
5 12.00 18.00 19.00
===========================================================================
高手们 如何实现!!!
id index xm xm1 xm2 hz
8 3 wdy 5.0 5.0 10.00
9 3 hzs 5.0 5.0 12.00
10 3 xjb 4.0 6.0 15.00
16 4 wdy 5.0 5.0 11.00
17 4 hzs 5.0 5.0 114.00
18 4 xjb 5.0 5.0 20.00
19 5 wdy 4.0 6.0 12.00
20 5 hzs 5.0 5.0 18.00
21 5 xjb 4.0 6.0 19.00
=====================================================================
现在要实现如下查询结果
index wdy hzs xjb
3 10.00 12.00 15.00
4 11.00 114.00 20.00
5 12.00 18.00 19.00
===========================================================================
高手们 如何实现!!!
[index],
wdy=sum(case when xm='wdy' then hz else 0 end),
hzs=sum(case when xm='hzs' then hz else 0 end),
xjb=sum(case when xm='xjb' then hz else 0 end)
from tb group by [index]
-- Author :fredrickhu(小F 向高手学习)
-- Date :2009-08-12 14:48:03
----------------------------------------------------------------
--> 测试数据:[tb]
if object_id('[tb]') is not null drop table [tb]
go
create table [tb]([id] int,[index] int,[xm] varchar(3),[xm1] numeric(2,1),[xm2] numeric(2,1),[hz] numeric(5,2))
insert [tb]
select 8,3,'wdy',5.0,5.0,10.00 union all
select 9,3,'hzs',5.0,5.0,12.00 union all
select 10,3,'xjb',4.0,6.0,15.00 union all
select 16,4,'wdy',5.0,5.0,11.00 union all
select 17,4,'hzs',5.0,5.0,114.00 union all
select 18,4,'xjb',5.0,5.0,20.00 union all
select 19,5,'wdy',4.0,6.0,12.00 union all
select 20,5,'hzs',5.0,5.0,18.00 union all
select 21,5,'xjb',4.0,6.0,19.00
--------------开始查询--------------------------
declare @sql varchar(8000)
set @sql = 'select [index]'
select @sql = @sql + ' , sum(case xm when ''' + xm + ''' then hz else 0 end) [' + xm + ']'
from (select distinct xm from tb) as a
set @sql = @sql + ' from tb group by [index]'
exec(@sql)
----------------结果----------------------------
/*index hzs wdy xjb
----------- ---------------------------------------- ---------------------------------------- ----------------------------------------
3 12.00 10.00 15.00
4 114.00 11.00 20.00
5 18.00 12.00 19.00*/
2楼正解但是index一定要[]因为是关键字 不然会报错的
select * from table_1select [index],wdy=max(case when xm='wdy' then hz else 0 end),
hzs=max(case when xm='hzs' then hz else 0 end),
xjb=max(case when xm='xjb' then hz else 0 end)
from table_1 group by [index] id index xm xm1 xm2 hz
----------- ----------- -------------------------------------------------- ----------- ----------- -----------
1 3 wdy 5 5 10
2 3 hzs 5 5 12
3 3 xjb 4 6 15
4 4 wdy 5 5 11
5 4 hzs 5 5 114
6 4 xjb 5 5 20
7 5 wdy 4 6 12
8 5 hzs 5 5 18
9 5 xjb 4 6 19(9 行受影响)index wdy hzs xjb
----------- ----------- ----------- -----------
3 10 12 15
4 11 114 20
5 12 18 19
go
create table [tb]([id] int,[index] int,[xm] varchar(3),[xm1] numeric(2,1),[xm2] numeric(2,1),[hz] numeric(5,2))
insert [tb]
select 8,3,'wdy',5.0,5.0,10.00 union all
select 9,3,'hzs',5.0,5.0,12.00 union all
select 10,3,'xjb',4.0,6.0,15.00 union all
select 16,4,'wdy',5.0,5.0,11.00 union all
select 17,4,'hzs',5.0,5.0,114.00 union all
select 18,4,'xjb',5.0,5.0,20.00 union all
select 19,5,'wdy',4.0,6.0,12.00 union all
select 20,5,'hzs',5.0,5.0,18.00 union all
select 21,5,'xjb',4.0,6.0,19.00
select * from (select [index], xm ,hz from tb) m
pivot
(
sum(hz) for xm in(wdy,hzs,xjb)
) p/*
index wdy hzs xjb
----------- --------------------------------------- --------------------------------------- ---------------------------------------
3 10.00 12.00 15.00
4 11.00 114.00 20.00
5 12.00 18.00 19.00(3 行受影响)
*/
if object_id('[tb]') is not null drop table [tb]
go
create table [tb]([id] int,[index] int,[xm] varchar(3),[xm1] numeric(2,1),[xm2] numeric(2,1),[hz] numeric(5,2))
insert [tb]
select 8,3,'wdy',5.0,5.0,10.00 union all
select 9,3,'hzs',5.0,5.0,12.00 union all
select 10,3,'xjb',4.0,6.0,15.00 union all
select 16,4,'wdy',5.0,5.0,11.00 union all
select 17,4,'hzs',5.0,5.0,114.00 union all
select 18,4,'xjb',5.0,5.0,20.00 union all
select 19,5,'wdy',4.0,6.0,12.00 union all
select 20,5,'hzs',5.0,5.0,18.00 union all
select 21,5,'xjb',4.0,6.0,19.00
select
[index],
wdy=sum(case when xm='wdy' then hz else 0 end),
hzs=sum(case when xm='hzs' then hz else 0 end),
xjb=sum(case when xm='xjb' then hz else 0 end)
from tb group by [index]
--------------------------------------------------------
index wdy hzs xjb
3 10.00 12.00 15.00
4 11.00 114.00 20.00
5 12.00 18.00 19.00
(所影响的行数为 3 行)
[INDEX],
WDY=SUM(CASE WHERE XM='WDY' THEN HZ ELSE 0 END ),
HZS=SUM(CASE WHERE XM='HZS' THEN HZ ELSE 0 END ),
XJB=SUM(CASE WHERE XM='XJB' THEN HZ ELSE 0 END )
FROM TB GROUP BY [INDEX]
好像昨天 发过
/******************************************************************************************************************************************************
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)
*/
--原始数据如下
if object_id('[tb]') is not null drop table [tb]
go
create table [tb]([id] int,[index] int,[xm] varchar(3),[xm1] numeric(2,1),[xm2] numeric(2,1),[hz] numeric(5,2))
insert [tb]
select 8,3,'wdy',5.0,5.0,10.00 union all
select 9,3,'hzs',5.0,5.0,12.00 union all
select 10,3,'xjb',4.0,6.0,15.00 union all
select 16,4,'wdy',5.0,5.0,11.00 union all
select 17,4,'hzs',5.0,5.0,114.00 union all
select 18,4,'xjb',5.0,5.0,20.00 union all
select 19,5,'wdy',4.0,6.0,12.00 union all
select 20,5,'hzs',5.0,5.0,18.00 union all
select 21,5,'xjb',4.0,6.0,19.00
--------------开始查询--------------------------
declare @sql varchar(8000)
set @sql =
select @sql = @sql + ' , sum(case xm when ''' + xm + ''' then hz else 0 end) [' + xm + ']'set @sql = @sql +
exec(@sql)
alter proc dbo.hljcbb -- exec dbo.hljcbb
as
declare @sql_head nvarchar(4000),
@sql_foot nvarchar(4000),
@sql_body nvarchar(4000),
@sql_variable_definition nvarchar(4000),
@sql_variable_init nvarchar(4000),
@sql_variable_set nvarchar(4000),
@groups varchar(100)-->>>>>>1、确定需要定义的变量个数>>>>>>>>>drop table #1
select
id=identity(int,0,1),
gs=0,
fieldvalue=CAST(
N','+quotename(xm)
+N'=max(case when xm='+quotename(xm,N'''')
+N' then hz else 0 end)'
as Nvarchar(4000))
into #1 from (select distinct xm from tb) as a --要修改的临时表生成部分
group by [xm]
--select * from #1
-->>>>>2、分临时时表,通过G字段的值决定当前的处理代码应保存在那个变量中
update A
set @groups=id/l,gs=@groups
from #1 a
cross join(select l=3800/max(LEN(FIELDVALUE)) from #1)b-->>>>>>3.生成数据处理语句--select * from #1
select @sql_head=N''''+REPLACE('select [index]',N'''',N'''''')+N'''', --要修改的部分
@sql_foot=N''''+REPLACE(' from tb group by [index]',N'''',N'''''')+N'''', --要修改的部分
@sql_variable_definition=N'',
@sql_variable_init=N'',
@sql_variable_set=N'',
@sql_body=N''
while @groups>=0
select
@sql_variable_definition=N',@'+@groups+N' nvarchar(4000)'+@sql_variable_definition,
@sql_variable_init=N',@'+@groups+N'=N''''',
@sql_variable_set=N',@'+@groups+N'=case
when gs='+@groups+N' then @'+@groups+N'+fieldvalue
else @'+@groups+N'
end'+@sql_variable_set,
@sql_body=N'+@'+@groups+@sql_body,
@groups=@groups-1--去掉各变量中多余的前导符号
select
@sql_variable_definition=STUFF(@sql_variable_definition,1,1,N''), --stuff删除指定位置开始,指定数目的字符串,并在指定位置插入字符
@sql_variable_init=STUFF(@sql_variable_init,1,1,N''),
@sql_variable_set=STUFF(@sql_variable_set,1,1,N''),
@sql_body=STUFF(@sql_body,1,1,N'')
print @sql_head
print @sql_foot
print @sql_variable_definition
print @sql_variable_set
print @sql_variable_init
print @sql_body
--执行
exec(N'declare '+@sql_variable_definition+
N'select '+@sql_variable_init+
N'select '+@sql_variable_set+
N' from #1
exec(N'+@sql_head+N'
+'+@sql_body+N'
+'+@sql_foot+N')')
goexec dbo.hljcbb --执行存储过程
/*
结果
index hzs wdy xjb
3 12.00 10.00 15.00
4 114.00 11.00 20.00
5 18.00 12.00 19.00
*/
pivot( sum(hz) for xm in(wdy,hzs,xjb)) cc
一句搞定!