先创建一个学生表：
create table student
(
snum varchar(9) primary key,
sname char(8),
ssex char(4),
sage int
)
下面是创建的触发器：
create trigger tri_delete
on student
for delete
as
print '备份数据---'
insert into backup_s(snum,sname,ssex,sage)
select snum,sage from deleted
if @@Error =0
begin
print'备份成功,bacup_table中的数据为：'
select *from backup_s
print'备份成功,backup_s中的数据为：'
select *from student
end;
else
begin
print'备份失败！'
rollback
end
创建插入触发器，当插入的数据中年龄大于15小于60时执行成功，否则不成功；
create trigger tri_insert
on student
for insert
as
declare @isnum varchar(9)
declare @isname char(8)
declare @issex char(4)
declare @isage int
select @isnum=snum,@isname=sname,@issex=ssex,@isage=sage from inserted
if @isage<15
begin
print '年龄不合法'
select * from student
rollback
end
else if @isage>60
begin
print '年龄不合法'
select *from student
rollback
end
else
begin
print '成功'
select * from student
end
创建更新触发器，当更新的数据中年龄大于15小于60时执行成功，否则不成功；
create trigger tri_update
on student
for update
as
declare @oldsage int
declare @newsage int
select @oldsage=sage from deleted
select @newsage=sage from inserted
if @newsage<15
begin
print '年龄不合法'
rollback
end
else if @newsage>60
begin
print '年龄不合法'
rollback
end
else
print '成功'
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