Oracle 创建触发器

create or replace trigger DATA_SYNC_@TABLE@  before insert or update or delete on @TABLE@  REFERENCING OLD AS old_emp NEW AS new_emp  for each rowbegin  --通过应用程序修改时，F_SYNC_UPDATE=null或F_SYNC_UPDATE=0,此时不需要更新F_SYNC_DATE 时间戳，也不需要记录删除记录  if (:new_emp.F_SYNC_UPDATE is null) or (:new_emp.F_SYNC_UPDATE = 0) then    --插入和更新操作，更新时间戳F_SYNC_DATE=systimestamp和F_SYNC_UPDATE=null    if INSERTING or UPDATING then      select systimestamp, null        into :new_emp.F_SYNC_DATE, :new_emp.F_SYNC_UPDATE        from dual;    end if;    if INSERTING then      --把新增加的记录插入到操作记录表      insert into DATA_SYNC_B_OPERATOR        (t_name, o_type, o_date, VKEYS)      values        ('@TABLE@', 1, systimestamp, @INSERTVAL@);    end if;    if DELETING then      --把删除记录的主键添加到操作记录表      insert into DATA_SYNC_B_OPERATOR        (t_name, o_type, o_date, VKEYS)      values        ('@TABLE@', 3, systimestamp, @UPDATEVAL@);    end if;  end if;end DATA_SYNC_@TABLE@;