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///sql查询分析器里面操作

///删除视图

if exists(select table_name from information_schema.views where table_name='v_user')
drop view v_user

///创建视图

create view v_user
as
select * from Userinfo

///修改视图

alter view v)user
as
select uname,uage from Userinfo

///创建触发器

create trigger Ulog
on Userinfo --对Userinfo 进入插入时触发
for insert --,update,delete
as
declare @uname nvarchar(20)
declare @id bigint
select @id=ID from inserted --查询用户编号
select @uname=uname from Userinfo where Id=@id --查询用户姓名

begin
   INSERT INTO Userlog (info,itime) values('添加新的用户['+@uname+']！',getdate()) --插入到Userlog
end

///删除触发器

drop trigger Ulog