急,求如下视图!
己知开始时间sj和结束时间sj2
求这两个时间之间年份的视图。
例如:sj='1998-05-06',sj2='2002-01-04'
需要得到如下视图:
nianfen
1998
1999
2000
2001
2002
[解决办法]
用存储过程比较实际一点
[解决办法]
如果用视图也等同于
一个一个select
[解决办法]
如果楼主要这样效果:
- SQL code
gocreate view testasselect [nianfen]=dateadd(yy,t2.ID-1,t1.sj)from (select sj= '1998-05-06',sj2= '2002-01-04')t1, sysobjects t2where datediff(yy,t1.sj,t1.sj2)!<t2.ID-1goselect * from testnianfen ------------------------------------------------------ 1998-05-06 00:00:00.0001999-05-06 00:00:00.0002000-05-06 00:00:00.0002001-05-06 00:00:00.000(所影响的行数为 4 行)
[解决办法]
- SQL code
create view testasselect [nianfen]=year(dateadd(yy,t2.ID-1,t1.sj))--改为显示年份from (select sj= '1998-05-06',sj2= '2002-01-04')t1, sysobjects t2where datediff(yy,t1.sj,t1.sj2)!<t2.ID-1goselect * from testnianfen ----------- 1998199920002001(所影响的行数为 4 行)
[解决办法]
- SQL code
create proc test( @sj datetime,--'1998-05-06' @sj2 datetime--'2002-01-04')asdeclare @ta table(nianfen int)while year(@sj)!>year(@sj2)begin insert @ta select year(@sj) set @sj=dateadd(yy,1,@sj)endselect * from @tagoexec test '1998-05-06','2002-01-04'nianfen ----------- 19981999200020012002(所影响的行数为 5 行)
[解决办法]
视图改一下:
create view test
as
select [nianfen]=dateadd(yy,t2.ID-1,t1.sj)
from
(select sj= '1998-05-06',sj2= '2002-01-04')t1
,
sysobjects t2
where
datediff(yy,t1.sj,t1.sj2)!<t2.ID-1
union all
select '2002-01-04' --添加记录
[解决办法]
视图不可以传参:
漏了一个year:
create view test
as
select [nianfen]=dateadd(yy,t2.ID-1,t1.sj)
from
(select sj= '1998-05-06',sj2= '2002-01-04')t1
,
sysobjects t2
where
datediff(yy,t1.sj,t1.sj2)!<t2.ID-1
union all
select year('2002-01-04') --添加记录