oracle sql合计结果信息使用分组的小问题

  --月统计
   Select SUBSTR(t.BalanceDate,1,6) as Mon,  t.RechargeType ,  
    SUM(t.SumNum) as SumNum ,   
    SUM(t.SumFee) as SumFee    
    From  Recharge    t 
    Where  
    to_char(to_date(t.BalanceDate,'yyyy-mm-dd'),'yyyymm') BETWEEN to_char(to_date('2016-07-01','yyyy-mm-dd'),'yyyymm') 
    AND to_char(to_date('2016-07-01','yyyy-mm-dd'),'yyyymm') and  t.rechargetype='1'
    Group  by  SUBSTR(t.BalanceDate,1,6) , t.RechargeType 
    Order by SUBSTR(t.BalanceDate,1,6)  DESC

   --年统计
    Select SUBSTR(t.BalanceDate,1,4) as Year,  t.RechargeType ,  
    SUM(t.SumNum) as SumNum ,   
    SUM(t.SumFee) as SumFee    
    From  Recharge   t  Where  
    to_char(to_date(t.BalanceDate,'yyyy-mm-dd'),'yyyy') BETWEEN to_char(to_date('2016-07-01','yyyy-mm-dd'),'yyyy') 
    AND to_char(to_date('2016-07-01','yyyy-mm-dd'),'yyyymm') and  t.rechargetype='1'
   
    Group  by  SUBSTR(t.BalanceDate,1,4) , t.RechargeType 
    Order by SUBSTR(t.BalanceDate,1,4)  DESC

根据年月统计分组 请注意group by 和order by 排序字段 要和查询条件的取值一样。点点滴滴随记一笔。