摘要： with c as (select a.trandt,sum(a.tranam) tranam from tran a group by a.trandt )--将子查询抽取出来，以后可以直接用。该方法只适用于oracle，mysql不支持 select c.trandt, sum(d.tranam) from c inner join c d on c.trandt >= d... 阅读全文