Hive rows between ,range between 的理解跟案例
unbounded preceding 起始行unbounded following 结尾行current row 当前行1 preceding 当前行的前1行1 following 当前行的后1行首先这是数据格式1.当前行到最后一行的汇总（逐行递减）with tt as(select a.*,sum(mainid)over(rows between current row and unbounded following) as sumsfrom (select r
