题解 | #统计salary的累计和running_total#
统计salary的累计和running_total
http://www.nowcoder.com/practice/58824cd644ea47d7b2b670c506a159a6
select emp_no, salary,
sum(salary) over(order by emp_no) as running_total
from salaries
where to_date='9999-01-01'
https://zhuanlan.zhihu.com/p/120269203 sql窗口函数的介绍
