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
- 坑：order by默认的窗口就是截至到当前行，不用再额外加了。。。
SELECT
emp_no,salary,
sum(salary) over( order by emp_no ) as running_total
from salaries
where to_date = '9999-01-01';
