题解:统计salary的累计和running_total
统计salary的累计和running_total
http://www.nowcoder.com/questionTerminal/58824cd644ea47d7b2b670c506a159a6
SELECT emp_no, salary, SUM(salary) OVER(ORDER BY emp_no) AS running_total FROM salaries WHERE to_date = '9999-01-01'
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