HIVE SQL 聚合函数与 rows between / range between详解
一、rows between 与 range between 用法1. 相关关键词解析unbounded 无边界preceding 往前following 往后unbounded preceding 往前所有行，即初始行n preceding 往前n行unbounded following 往后所有行，即末尾行n following 往后n行current row 当前行语法(ROWS | RANGE) BETWEEN (UNBOUNDED | [num]) PRECEDI
