oracle數據庫子查詢的結果需要使用多次解決辦法

with c as  (select a.trandt,sum(a.tranam) tranam from tran a group by a.trandt )--將子查詢抽取出來，以后可以直接用。該方法只適用於oracle，mysql不支持
select c.trandt, sum(d.tranam)
  from  c
 inner join c d
    on c.trandt >= d.trandt
 group by c.trandt 


select c.trandt, sum(d.tranam)
  from (select a.trandt, sum(a.tranam) tranam
          from tran a
         group by a.trandt
         order by a.trandt) c
 inner join (select a.trandt, sum(a.tranam) tranam
               from tran a
              group by a.trandt
              order by a.trandt) d
    on c.trandt >= d.trandt
 group by c.trandt