日期:2014-05-18  浏览次数:20641 次

SQL 行转列
现有表[Hong_Props],表中的字段如下:

PropID PropGameType PropArrea type PropTime Props PropsCoun

  1 1 1 金币 2012-02-11 道具A 24
  2 2 2 金币 2012-02-11 道具B 15
  3 1 1 绑定金币 2012-02-12 道具C 14
  4 2 1 金币 2012-02-12 道具D 2
  5 2 2 金币 2012-02-13 道具D 50
  6 1 2 绑定金币 2012-02-14 道具B 9
  7 2 2 绑定金币 2012-02-15 道具E 10
  8 1 1 金币 2012-02-15 道具A 20
   
   
先我要得到的查询效果为:

  日期 道具A 道具B 道具C 道具D 道具E 累计
2012-02-11 24 15 0 0 0 39  
2012-02-12 0 0 14 2 0 16
2012-02-13 0 0 0 50 0 50  
2012-02-14 0 9 0 0 10 19
2012-02-15 20 0 0 0 10 30


急求高手帮忙!
急求高手帮忙!
急求高手帮忙!
急求高手帮忙!

------解决方案--------------------
SQL code

--PropTime Props PropsCoun
declare @sql varchar(8000)
set @sql = 'select convert(varchar(10),PropTime,120) PropTime'
select @sql = @sql + ',sum(case when convert(varchar(10),PropTime,120)='''+date+''' then PropsCoun else 0 end) ['+date+']'
from(select convert(varchar(10),PropTime,120) date from Hong_Props group by convert(varchar(10),PropTime,120)) t
select @sql = @sql + ' from Hong_Props group by convert(varchar(10),PropTime,120)'
exec(@sql)

------解决方案--------------------
好像做过类是的帖子

http://topic.csdn.net/u/20120217/11/cb980785-7fe5-4e64-a939-312759193221.html
------解决方案--------------------
SQL code
create table Hong_Props(
PropID int,PropGameType int,PropArrea int,PropTime datetime,Props varchar(20),PropsCoun int
)
insert into Hong_Props
select 1 ,1 ,1 ,'2012-02-11' ,'道具A' ,24 union all
select 2 ,2 ,2 ,'2012-02-11' ,'道具B' ,15 union all
select 3 ,1 ,1 ,'2012-02-12' ,'道具C' ,14 union all
select 4 ,2 ,1 ,'2012-02-12' ,'道具D' ,2 union all
select 5 ,2 ,2 ,'2012-02-13' ,'道具D' ,50 union all
select 6 ,1 ,2 ,'2012-02-14' ,'道具B' ,9 union all
select 7 ,2 ,2 ,'2012-02-15' ,'道具E' ,10 union all
select 8 ,1 ,1 ,'2012-02-15' ,'道具A' ,20
go

 
declare @str varchar(max)
set @str = 'select convert(varchar(10),PropTime,120) PropTime'
select @str = @str + ',sum(case when Props='''+Props+''' then PropsCoun else 0 end) ['+Props+']'
from(select Props from Hong_Props group by Props ) t
select @str = @str + ' from Hong_Props group by  PropTime'
exec(@str)


PropTime   道具A         道具B         道具C         道具D         道具E
---------- ----------- ----------- ----------- ----------- -----------
2012-02-11 24          15          0           0           0
2012-02-12 0           0           14          2           0
2012-02-13 0           0           0           50          0
2012-02-14 0           9           0           0           0
2012-02-15 20          0           0           0           10

(5 行受影响)

------解决方案--------------------
探讨

引用:

SQL code

--PropTime Props PropsCoun
declare @sql varchar(8000)
set @sql = 'select convert(varchar(10),PropTime,120) PropTime'
select @sql = @sql + ',sum(case when convert……

------解决方案--------------------
SQL code
declare @str varchar(max)
set @str = 'select convert(varchar(10),PropTime,120) PropTime'
select @str = @str + ',sum(c