题解 | 统计出当前各个title类型对应的员工当前薪水对应的平均工资
统计出当前各个title类型对应的员工当前薪水对应的平均工资
https://www.nowcoder.com/practice/c8652e9e5a354b879e2a244200f1eaae
select A.title, avg(B.salary) from titles A left join salaries B on A.emp_no = B.emp_no group by A.title order by avg(B.salary) ASC