oracle数据库高级应用之《触发器的建立》

（一）oracle数据库触发器的建立

eg1

CREATE OR REPLACE TRIGGER TRIGGER_ON_TD_DEPARTMENT
       AFTER INSERT OR UPDATE OR DELETE ON TD_DEPARTMENT
       REFERENCING OLD AS old NEW AS new
       FOR EACH ROW
declare
   v_opttype varchar2(8);
BEGIN

      if inserting then
         v_opttype := 'ADD';
      else
         v_opttype := 'MOD';

         if UPPER(:new.valid_falg) = 'N' and UPPER(:old.valid_falg) = 'Y' then
           v_opttype := 'DEC';
         end if;

         if UPPER(:new.valid_falg) = 'Y' and UPPER(:old.valid_falg) = 'N' then
           v_opttype := 'ADD';
         end if;

      end if;

      insert into TD_DEPARTMENT_TRIGER(id, dep_id, dep_name, dep_sname, comp_id, super_id, valid_falg,  start_date, end_date, xorder, dep_grade, dep_type,
dep_proy,dep_city, optdate,rmk, qq_flag, qq_optdate, mail_flag,mail_optdate,hr_flag, hr_optdate,oa_flag, oa_optdate, rtx_flag, rtx_optdate,opt_type, opt_date)
      select :new.id,:new.dep_id,:new.dep_name,:new.dep_sname,:new.comp_id,:new.super_id,:new.valid_falg,:new.start_date,:new.end_date,:new.xorder,new.dep_grade,:new.dep_type,
:new.dep_proy,  :new.dep_city,  :new.optdate,  :new.rmk,'',sysdate,'',sysdate,'',sysdate,'',sysdate,'',sysdate,v_opttype,sysdate from dual;
END;