题解 |
统计salary的累计和running_total
https://www.nowcoder.com/practice/58824cd644ea47d7b2b670c506a159a6
####聚合窗口函数 sum(salary) over(order by emp_no,salary desc) running_total 得到了截止到当前条数据的时候 的累计薪水工资。
select emp_no,
salary,
sum(salary) over(order by emp_no,salary desc) running_total
from salaries
where to_date = '9999-01-01';
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