Oracle 触发器 示例

create or replace trigger UserToTemp after insert or update or delete
on t_cs_one for each row
declare
   integrity_error exception;
    errno            integer;
   errmsg           char(200);
    tem1         varchar2(10);
   
begin
   
if inserting then
  select count(mc2) into tem1 from t_cs_two where mc2=:NEW.mc1;      //将
   if tem1<=0 then
   insert into t_cs_two (mc2) values(:NEW.mc1);
   end if;
elsif updating then   
    update t_cs_two set mc2=:NEW.mc1 where mc2=:OLD.mc1;  
elsif deleting then
    delete from t_cs_two where mc2=:OLD.mc1;
end if;
exception
    when integrity_error then
       raise_application_error(errno, errmsg);
end;