BEGIN declare prehisid varchar(50); declare prehisid2 varchar(50); declare recordNum int; declare ListCount int; declare iRow int; declare iRow2 int; -- 获取处方表的行数 --  select count(*)  into ListCount from prescription ; set iRow = 1;  -- 遍历处方表 -- WHILE (iRow <= ListCount) do  set iRow2 = iRow-1;    -- 获取处方表的HIS id --  SELECT PRESCRIPTION_HIS_ID into prehisid  from prescription ORDER BY PRESCRIPTION_HIS_ID LIMIT iRow2,iRow;  if prehisid is not null THEN   -- 获取状态表的处方hisid 和 相同处方hisid个数 --    select count(*) ,prescriptionhisid into recordNum,prehisid2 from rcaccept where prescriptionhisid=PreHisId  limit 1;   -- 存在则更新（恢复原始状态） ，不存在则插入 --   if(recordNum > 0) then    update rcaccept rc set rc.bybs=0 where prescriptionhisid= prehisid2;   else    insert into rcaccept(prescriptionhisid,bybs)values(PreHisId,0);   end if;  end if; set iRow = iRow+1; end while; END