create or replace trigger test_trigger    before insert or update or delete on test_table    for each row  declare    v_id        varchar2(30);    v_bdlb      varchar2(1);    v_jgdm      VARCHAR2(12);    v_jgmc      VARCHAR2(60);    v_gajgmc    VARCHAR2(60);    v_gajgwsmc  VARCHAR2(30);    v_jz        VARCHAR2(30);    v_ksdwsdwmc VARCHAR2(30);  begin    /*      插入时往历史表中存放的是新插入的数据.      修改时往历史表中存放的是修改后的数据.      删除时往历史表中存放的是删除之前的数据.    */    select org_id_s.nextval into v_id from dual; -- 利用seq生成主键    v_jgdm     := :new.row_id;    v_jgmc     := :new.dept_name;    v_gajgmc   := :new.dept_name;    v_gajgwsmc := :new.bmjc;    v_jz       := substr(v_jgdm, 7, 2);    if '2' = :new.depttype then      v_ksdwsdwmc := 'shiju';    else      if '03' = v_jz then        v_ksdwsdwmc := 'zhi';      elsif '05' = v_jz then        v_ksdwsdwmc := 'xing';      elsif '51' = v_jz then        v_ksdwsdwmc := 'she';      else        v_ksdwsdwmc := 'qita';      end if;    end if;    if inserting then      v_bdlb := '1';      insert into test_table_h        (id, bdlb, jgdm, jgmc, gajgmc, gajgwsmc, jz, ksdwsdwmc)      values        (v_id,         v_bdlb,         v_jgdm,         v_jgmc,         v_gajgmc,         v_gajgwsmc,         v_jz,         v_ksdwsdwmc);    elsif updating then      v_bdlb := '2';      insert into test_table_h        (id, bdlb, jgdm, jgmc, gajgmc, gajgwsmc, jz, ksdwsdwmc)      values        (v_id,         v_bdlb,         v_jgdm,         v_jgmc,         v_gajgmc,         v_gajgwsmc,         v_jz,         v_ksdwsdwmc);    else      v_bdlb     := '3';      v_jgdm     := :old.row_id;      v_jgmc     := :old.dept_name;      v_gajgmc   := :old.dept_name;      v_gajgwsmc := :old.bmjc;      v_jz       := substr(v_jgdm, 7, 2);      if '2' = :old.depttype then        v_ksdwsdwmc := 'shiju';      else        if '03' = v_jz then          v_ksdwsdwmc := 'zhi';        elsif '05' = v_jz then          v_ksdwsdwmc := 'xing';        elsif '51' = v_jz then          v_ksdwsdwmc := 'she';        else          v_ksdwsdwmc := 'qita';        end if;      end if;      insert into test_table_h        (id, bdlb, jgdm, jgmc, gajgmc, gajgwsmc, jz, ksdwsdwmc)      values        (v_id,         v_bdlb,         v_jgdm,         v_jgmc,         v_gajgmc,         v_gajgwsmc,         v_jz,         v_ksdwsdwmc);    end if;  end;