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请教一个按日期统计的SQL

zedan 2009-07-08 02:05:43

Table A
ID WID Date
1 1 2009/7/1
2 1 2009/7/10
3 1 2009/7/12
4 2 2009/7/1
5 2 2009/8/1

Table W
WID WName
1 WA
2 WB
3 WC
4 WD

传入日期 start-2009/7/1, end-2009/7/20
求这日期内每个星期在Table A的数据统计和
即返回
ID WName 2009/7/1-2009/7/7 2009/7/8-2009/7/15 2009/7/16-2009/7/20
1 WA 1 2 0
2 WB 1 0 0
3 WC 0 0 0
4 WD 0 0 0

求SQL?

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切换为时间正序

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kajaje 2009-07-08

参考下帮助丛书里的交叉数据报表，有些类似

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子陌红尘 2009-07-08

create table A(ID int,WID int,Date datetime)

insert into A select 1,1,'2009/07/01' 

insert into A select 2,1,'2009/07/10' 

insert into A select 3,1,'2009/07/12' 

insert into A select 4,2,'2009/07/01' 

insert into A select 5,2,'2009/08/01' 



create table W(WID int,WName varchar(10))

insert into W select 1,'WA' 

insert into W select 2,'WB' 

insert into W select 3,'WC' 

insert into W select 4,'WD' 

go





create procedure sp_test(@str datetime,@end datetime)

as

begin

  declare @sql varchar(8000)

  set @sql='select W.WID,W.WName'



  while @str<@end

  begin

    set @sql=@sql+',['+convert(char(10),@str,111)+'-'+convert(char(10),(case when @str+6<@end then @str+6 else @end end),111)+']='

                 +'sum(case when Date between '''+convert(char(10),@str,111)+''' and '''

                 +convert(char(10),(case when @str+6<@end then @str+6 else @end end),111)+''' then 1 else 0 end)'

    set @str=@str+7

  end

  set @sql=@sql+' from W left join A on A.WID=W.WID group by W.WID,W.WName '

  exec(@sql)

end

go



exec sp_test '2009/7/1','2009/7/20'

go



/*

WID         WName      2009/07/01-2009/07/07 2009/07/08-2009/07/14 2009/07/15-2009/07/20 

----------- ---------- --------------------- --------------------- --------------------- 

1           WA         1                     2                     0

2           WB         1                     0                     0

3           WC         0                     0                     0

4           WD         0                     0                     0

*/



drop procedure sp_test

drop table A,W

go

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zedan 2009-07-08

以# htl258 (Tony)的例子，
如果 Student加多一行数据，
王五语文 80，他其它科目缺考，即都显示为0分，
如何写?
应该不一样写法吧？

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pt1314917 2009-07-08

--> 测试数据: [A]

if object_id('[A]') is not null drop table [A]

create table [A] (ID int,WID int,Date datetime)

insert into [A]

select 1,1,'2009/7/1' union all

select 2,1,'2009/7/10' union all

select 3,1,'2009/7/12' union all

select 4,2,'2009/7/1' union all

select 5,2,'2009/8/1'

--> 测试数据: [W]

if object_id('[W]') is not null drop table [W]

create table [W] (WID int,WName varchar(2))

insert into [W]

select 1,'WA' union all

select 2,'WB' union all

select 3,'WC' union all

select 4,'WD'

go



--创建存储过程

create proc wsp

@star datetime,

@end datetime

as

	declare @t table(star datetime,[end] datetime)

	while(@star<=@end)

	begin

		if(dateadd(dd,7,@star)<=@end)

			insert into @t select @star,dateadd(dd,6,@star)

		else

			insert into @t select @star,@end

		set @star=dateadd(dd,7,@star)

	end

	declare @sql varchar(8000)

	set @sql='select w.wid,w.wname'

	select @sql=@sql+',['+convert(varchar(10),star,120)+'-'+convert(varchar(10),[end],120)+']=sum( 

	case when Date between '''+convert(varchar(10),star,120)+''' and '''+convert(varchar(10),[end],120)+''' then 1 else 0 end)'

	from @t

	set @sql=@sql+' from W left join a on a.wid=w.wid group by w.wid,w.wname'

	exec(@sql)

go





--执行

exec wsp '2009/7/1','2009/7/20'



--结果：

wid         wname 2009-07-01-2009-07-07 2009-07-08-2009-07-14 2009-07-15-2009-07-20

----------- ----- --------------------- --------------------- ---------------------

1           WA    1                     2                     0

2           WB    1                     0                     0

3           WC    0                     0                     0

4           WD    0                     0                     0

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zzz1975 2009-07-08

粘贴一个例子

Create Table 表(year varchar(10),name varchar(10),value varchar(10))
--插入数据
insert into 表
select '2002','a','1' union
select '2002','b','4' union
select '2002','c','5' union
select '2003','a','7' union
select '2003','b','5' union
select '2003','c','4' union
select '2004','a','4'
select * from 表
--测试语句
DECLARE @SQL VARCHAR(8000)
SET @SQL='SELECT name'
SELECT @SQL= @SQL+
',MIN(CASE WHEN year = ''' + year + ''' THEN value END) [' + year + ']'
FROM (SELECT DISTINCT year FROM 表) A
SET @SQL=@SQL+' FROM 表 GROUP BY name'
exec (@SQL)

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htl258_Tony 2009-07-08

--行列互转

/******************************************************************************************************************************************************

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)

*/