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
使用窗口函数
select emp_no, salary, sum(salary)
over(order by emp_no) as running_total
from salaries
where to_date='9999-01-01';
over(order by emp_no) as running_total
from salaries
where to_date='9999-01-01';
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