题解 | 最原始的小白写法
对所有员工的薪水按照salary降序进行1-N的排名
http://www.nowcoder.com/practice/b9068bfe5df74276bd015b9729eec4bf
SELECT s1.emp_no, s1.salary, (COUNT(s2.salary))+1 AS t_rank
FROM salaries s1 LEFT JOIN
(SELECT DISTINCT salary FROM salaries) s2
ON s1.salary<s2.salary
GROUP BY emp_no
ORDER BY salary DESC, emp_no ASC
