Create Function f_getid()
Returns Varchar(13)
As
Begin
Declare @id varchar(13),@dt varchar(8)
Select @dt=dt From v_getdate
Select @id=max(id) From tb Where id like @dt+'%'
IF @id Is null
Set @id=@dt+'0001'
Else
Set @id=@dt+Right('0000'+Cast(Cast(Right(@id,3) As Int)+1 As Varchar),4)
Return(@id)
End
Go
--创建表
Create table tb(id varchar(20) default dbo.f_getid() primary key,name varchar(10))
go
--创建视图,得到当前日期(因为函数中不能使用getdate())
Create view v_getdate as select dt=convert(varchar,getdate(),012)
go
--插入记录测试
insert into tb(name) values('张三')
insert into tb(name) values('张四')
insert into tb(name) values('张五')
insert into tb(name) values('张六')
insert into tb(name) values('张七')
insert into tb(name) values('张八')
insert into tb(name) values('张九')
insert into tb(name) values('张十')
insert into tb(name) values('张十一')
insert into tb(name) values('张十二')
--显示插入的结果
select * from tb
go
id name
-------------------- ----------
0411040001 张三
0411040002 张四
0411040003 张五
0411040004 张六
0411040005 张七
0411040006 张八
0411040007 张九
0411040008 张十
0411040009 张十一
0411040010 张十二
--删除环境
drop table tb
drop view v_getdate
drop function f_getid
author :miss wang reshipment
