SQL（SQL Server培训 mySQL培训 ） Server数据库（数据库培训 数据库认证 ）动态交叉表的参考示例:
--建立测试环境
以下为引用的内容：
set nocount on
create table test(model varchar(20),date int ,qty int)
insert into test select 'a','8','10'
insert into test select 'a','10','50'
insert into test select 'b','8','100'
insert into test select 'b','9','200'
insert into test select 'b','10','100'
insert into test select 'c','10','200'
insert into test select 'd','10','300'
insert into test select 'e','11','250'
insert into test select 'e','12','100'
insert into test select 'f','12','150'
go
--测试
declare @sql varchar(8000)
set @sql='select model,'
select @sql=@sql+'sum(case when
date='''+cast(date as varchar(10))+''' then qty else 0 end)
['+cast(date as varchar(10))+'],'
from (select distinct top 100 percent date
from test order by date)a
set @sql =left(@sql,len(@sql)-1)+' from test group by model'
exec(@sql)
--删除测试环境
drop table test
set nocount off
/**//*
model 8 9 10 11 12
-------------------- ----------- ----------- ----------- ----------- -----------
a 10 0 50 0 0
b 100 200 100 0 0
c 0 0 200 0 0
d 0 0 300 0 0
e 0 0 0 250 100
f 0 0 0 0 150
*/ |
