数据库列转行 100分送上

--建立测试环境

IF OBJECT_ID('tb') IS NOT NULL  DROP TABLE tb

GO

CREATE TABLE tb

(

	id int ,

	HeadID int, 

	FNumber varchar(10),

	MakeNO varchar(20), 

	FName	varchar(20), 

	FModel varchar(40), 

    CONSTRAINT PK_TB PRIMARY KEY (id)

)

GO

INSERT TB

 select '46','23','2.2.2.07','20100600001','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '47','23','2.2.2.07','20100600002','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '48','23','2.2.2.07','20100600003','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '49','23','2.2.2.07','20100600004','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '50','23','2.2.2.07','20100600005','铜热电阻','Cu50WZC--020--50+150' union all 

 select '51','23','2.2.2.07','20100600006','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '52','23','2.2.2.07','20100600007','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '53','23','2.2.2.07','20100600008','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '54','23','2.2.2.07','20100600009','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '55','23','2.2.2.07','20100600010','铜热电阻','Cu50WZC--020--50+150' union all 

 select '56','23','2.2.2.07','20100600011','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '57','23','2.2.2.07','20100600012','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '58','23','2.2.2.07','20100600013','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '59','23','2.2.2.07','20100600014','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '60','23','2.2.2.07','20100600015','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '61','23','2.2.2.08','20100600050','E型热电偶芯','L=150 φ27'  union all 

 select '62','23','2.2.2.08','20100600051','E型热电偶芯','L=150 φ27'  union all 

 select '63','23','2.2.2.08','20100600052','E型热电偶芯','L=150 φ27'  union all 

 select '64','23','2.2.2.07','20100600016','铜热电阻','Cu50WZC--020--50+150'  union all 

 select '65','23','2.1.1.1','20100500100','防水耐高温电缆','AFF46/260 8*1.5'  union all 

 select '66','23','2.1.1.1','20100500101','防水耐高温电缆','AFF46/260 8*1.5'  union all 

 select '67','23','2.1.1.1','20100500102','防水耐高温电缆','AFF46/260 8*1.5'  union all 

 select '68','23','2.1.1.1','20100500103','防水耐高温电缆','AFF46/260 8*1.5' union all 

 select '69','23','2.1.1.1','20100500104','防水耐高温电缆','AFF46/260 8*1.5'  union all 

 select '70','23','2.1.1.1','20100500105','防水耐高温电缆','AFF46/260 8*1.5' union all 

 select '71','23','2.1.1.1','20100500106','防水耐高温电缆','AFF46/260 8*1.5' union all 

 select '72','23','2.1.1.1','20100500107','防水耐高温电缆','AFF46/260 8*1.5' union all 

 select '73','23','2.1.1.1','20100500108','防水耐高温电缆','AFF46/260 8*1.5' union all 

 select '74','23','2.1.1.1','20100500109','防水耐高温电缆','AFF46/260 8*1.5' union all 

 select '75','23','2.1.1.1','20100500110','防水耐高温电缆','AFF46/260 8*1.5' union all 

 select '76','23','2.1.1.1','20100500111','防水耐高温电缆','AFF46/260 8*1.5' union all 

 select '77','23','2.1.1.1','20100500112','防水耐高温电缆','AFF46/260 8*1.5'

--查询

select case when rn/10=0 then FModel else '' end FModel,

max(case when rn%10=0 then MakeNO else '' end) as MakeNO01,

max(case when rn%10=1 then MakeNO else '' end) as MakeNO02,

max(case when rn%10=2 then MakeNO else '' end) as MakeNO03,

max(case when rn%10=3 then MakeNO else '' end) as MakeNO04,

max(case when rn%10=4 then MakeNO else '' end) as MakeNO05,

max(case when rn%10=5 then MakeNO else '' end) as MakeNO06,

max(case when rn%10=6 then MakeNO else '' end) as MakeNO07,

max(case when rn%10=7 then MakeNO else '' end) as MakeNO08,

max(case when rn%10=8 then MakeNO else '' end) as MakeNO09,

max(case when rn%10=9 then MakeNO else '' end) as MakeNO10

from(

select MakeNO,FModel,

rn=(select count(1) from tb where FModel=t.FModel and MakeNO<t.MakeNO) 

from tb t) a

group by a.FModel,a.rn/10

order by a.FModel,a.rn/10

--结果

/*

FModel                                   MakeNO01             MakeNO02             MakeNO03             MakeNO04             MakeNO05             MakeNO06             MakeNO07             MakeNO08             MakeNO09             MakeNO10

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

AFF46/260 8*1.5                          20100500100          20100500101          20100500102          20100500103          20100500104          20100500105          20100500106          20100500107          20100500108          20100500109

                                         20100500110          20100500111          20100500112                                                                                                                                        

Cu50WZC--020--50+150                     20100600001          20100600002          20100600003          20100600004          20100600005          20100600006          20100600007          20100600008          20100600009          20100600010

                                         20100600011          20100600012          20100600013          20100600014          20100600015          20100600016                                                                         

L=150 φ27                                20100600050          20100600051          20100600052                                                                                                                                        



(5 行受影响)





*/

/*

标题：普通行列转换(version 2.0)

作者：爱新觉罗.毓华(十八年风雨,守得冰山雪莲花开)

时间：2008-03-09

地点：广东深圳

说明：普通行列转换(version 1.0)仅针对sql server 2000提供静态和动态写法，

	  version 2.0增加sql server 2005的有关写法。



问题：假设有张学生成绩表(tb)如下:

姓名 课程 分数

张三 语文 74

张三 数学 83

张三 物理 93

李四 语文 74

李四 数学 84

李四 物理 94

想变成(得到如下结果)： 

姓名 语文 数学 物理 

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

李四 74   84   94

张三 74   83   93

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

*/



create table tb(姓名 varchar(10) , 课程 varchar(10) , 分数 int)

insert into tb values('张三' , '语文' , 74)

insert into tb values('张三' , '数学' , 83)

insert into tb values('张三' , '物理' , 93)

insert into tb values('李四' , '语文' , 74)

insert into tb values('李四' , '数学' , 84)

insert into tb values('李四' , '物理' , 94)

go



--SQL SERVER 2000 静态SQL,指课程只有语文、数学、物理这三门课程。(以下同)

select 姓名 as 姓名 ,

  max(case 课程 when '语文' then 分数 else 0 end) 语文,

  max(case 课程 when '数学' then 分数 else 0 end) 数学,

  max(case 课程 when '物理' then 分数 else 0 end) 物理

from tb

group by 姓名



--SQL SERVER 2000 动态SQL,指课程不止语文、数学、物理这三门课程。(以下同)

declare @sql varchar(8000)

set @sql = 'select 姓名 '

select @sql = @sql + ' , max(case 课程 when ''' + 课程 + ''' then 分数 else 0 end) [' + 课程 + ']'

from (select distinct 课程 from tb) as a

set @sql = @sql + ' from tb group by 姓名'

exec(@sql) 



--SQL SERVER 2005 静态SQL。

select * from (select * from tb) a pivot (max(分数) for 课程 in (语文,数学,物理)) b



--SQL SERVER 2005 动态SQL。

declare @sql varchar(8000)

select @sql = isnull(@sql + '],[' , '') + 课程 from tb group by 课程

set @sql = '[' + @sql + ']'

exec ('select * from (select * from tb) a pivot (max(分数) for 课程 in (' + @sql + ')) b')



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



/*

问题：在上述结果的基础上加平均分，总分，得到如下结果：

姓名 语文 数学 物理 平均分 总分 

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

李四 74   84   94   84.00  252

张三 74   83   93   83.33  250

*/



--SQL SERVER 2000 静态SQL。

select 姓名 姓名,

  max(case 课程 when '语文' then 分数 else 0 end) 语文,

  max(case 课程 when '数学' then 分数 else 0 end) 数学,

  max(case 课程 when '物理' then 分数 else 0 end) 物理,

  cast(avg(分数*1.0) as decimal(18,2)) 平均分,

  sum(分数) 总分

from tb

group by 姓名



--SQL SERVER 2000 动态SQL。

declare @sql varchar(8000)

set @sql = 'select 姓名 '

select @sql = @sql + ' , max(case 课程 when ''' + 课程 + ''' then 分数 else 0 end) [' + 课程 + ']'

from (select distinct 课程 from tb) as a

set @sql = @sql + ' , cast(avg(分数*1.0) as decimal(18,2)) 平均分 , sum(分数) 总分 from tb group by 姓名'

exec(@sql) 



--SQL SERVER 2005 静态SQL。

select m.* , n.平均分 , n.总分 from

(select * from (select * from tb) a pivot (max(分数) for 课程 in (语文,数学,物理)) b) m,

(select 姓名 , cast(avg(分数*1.0) as decimal(18,2)) 平均分 , sum(分数) 总分 from tb group by 姓名) n

where m.姓名 = n.姓名



--SQL SERVER 2005 动态SQL。

declare @sql varchar(8000)

select @sql = isnull(@sql + ',' , '') + 课程 from tb group by 课程

exec ('select m.* , n.平均分 , n.总分 from

(select * from (select * from tb) a pivot (max(分数) for 课程 in (' + @sql + ')) b) m , 

(select 姓名 , cast(avg(分数*1.0) as decimal(18,2)) 平均分 , sum(分数) 总分 from tb group by 姓名) n

where m.姓名 = n.姓名')



drop table tb