insert into t_pmpt_cp  select sub_ring_id ,@mac_id,,@proc_id,@ti_id  from t_ring where 1 = 1 and ( (select COUNT(1) as num from t_pmpt_cp where sub_ring_id = sub_ring_id and proc_id = @proc_id and mac_id = @mac_id and ti_id = @ti_id  )<1)  

insert into t_pmpt_cp  select sub_ring_id ,@mac_id,,@proc_id,@ti_id  from t_ring a
where not exists(select 1 form t_pmpt_cp where id=a.sub_ring_id  --假设以id列作比较,如果有ID相同则为存在
     and ( (select COUNT(1) as num from t_pmpt_cp where sub_ring_id = sub_ring_id and proc_id = @proc_id and mac_id = @mac_id and ti_id = @ti_id  )<1)