--会员表
if object_id('userinfo','u') is not null
drop table userinfo
go
create table userinfo(userid int primary key,user_tegral int,level int)
insert into userinfo select 1,0,0
go
--会员等级表
if object_id('userlevel','u') is not null
drop table userlevel
go

--插入测试数据
create table userlevel(level int primary key,mlevel_point decimal(10,2))
insert into userlevel select 0,0
insert into userlevel select 1,100
insert into userlevel select 2,200
insert into userlevel select 3,300
go



--触发器
create trigger TR_userInfor
on userinfo for update
as
begin

update a
set a.level=b.level
from userinfo a,userlevel b
where a.userid in(Select userid from inserted) and a.user_tegral>=b.mlevel_point and
a.user_tegralb.mlevel_point)
end

--测试
update userinfo
set user_tegral=100
where userid=1

select * from userinfo


--另外一个触发器
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
ALTER TRIGGER [AlterName]
ON [dbo].[FS_User]
FOR INSERT
AS
BEGIN
SET NOCOUNT ON;
UPDATE dbo.FS_User SET uname=(SELECT uname FROM Inserted)+'@ml'
WHERE id IN (SELECT id FROM inserted)
END