復(fù)制代碼 代碼如下:
create table test3(id int primary key not null
identity(1,1),uname varchar(20),uage int);
create table test3_bak(id int primary key not
null identity(1,1),bid int,uname varchar(20),
uage int,active char(1));
第二步，編寫備份用的觸發(fā)器，只有更新或者是插入的時候才觸發(fā)
復(fù)制代碼 代碼如下:
alter trigger test3_bak_insert_update
on test3
for insert,update
as
declare @id int
declare @uname varchar(20)
declare @uage int
begin
select @id=id,@uname=uname,@uage=uage from inserted
if @id<>0
begin
update test3_bak set active='0' where bid=@id
insert into test3_bak(bid,uname,uage,active)
values(@id,@uname,@uage,'1')
end
end
第三步，測試數(shù)據(jù)：
復(fù)制代碼 代碼如下:
insert into test3(uname,uage) values('FLB',20)
insert into test3(uname,uage) values('FLB1',21)
insert into test3(uname,uage) values('FLB2',22)
update test3 set uage=100 where id=27
delete from test3 where id=20
最后，你可自己采用下面方法查詢跟蹤兩個表的數(shù)據(jù)變化：
復(fù)制代碼 代碼如下:
select * from test3
select * from test3_bak
