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(rows between unbounded preceding and current row) running_total FROM salaries
WHERE to_date='9999-01-01';
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