简介

考察 over
从一行到另一行?? 先暂时这么记忆吧

select grade, sum(number) over(order by grade) t_rank
from class_grade
order by grade;
posted on 2021-07-01 11:51  HDU李少帅  阅读(34)  评论(0编辑  收藏  举报