Oracle 触发器 插入，更新，删除,数据同步，两表同步

create table User_Info (
ID INTEGER not null,
UserName VARCHAR(30) not null,
PassWord VARCHAR(20) not null,
CreateDate Date not null,
Status INTEGER not null,
constraint PK_User_Info primary key (ID)
);

create table User_Info_temp (
ID INTEGER not null,
UserName VARCHAR(30) not null,
PassWord VARCHAR(20) not null,
CreateDate Date not null,
Status INTEGER not null,
constraint PK_User_Info_temp primary key (ID)
);

触发器写法：

create or replace trigger UserToTemp after insert or update or delete
on user_info for each row
declare
integrity_error exception;
errno integer;
errmsg char(200);
dummy integer;
found boolean;

begin
if inserting then
insert into User_info_temp(ID,UserName,PassWord,CreateDate,Status) values(:NEW.ID,:NEW.UserName,:NEW.PassWord,:new.CreateDate,:NEW.Status);
elsif updating then
update User_info_temp set ID=:NEW.ID,UserName=:NEW.UserName,PassWord=:NEW.PassWord,Status=:NEW.Status where id=:OLD.id;
elsif deleting then
delete from User_info_temp where id=:OLD.id;
end if;
exception
when integrity_error then
raise_application_error(errno, errmsg);
end;

测试数据：
insert into user_info(ID,UserName,PassWord,CreateDate,Status)values(1,'xier','222',to_date('2008-10-11','yyyy-mm-dd'),1)

update user_info u set u.status=3,u.username='xier' where u.id=1

delete from user_info u where u.id=1