我已经通过这道算法题！统计出当前(titles.to_date='9999-01-01')各个title类型对应的员工当前(salaries.to_date='9999-01-01')薪水对应的平均工资。结果给出title... https://www.nowcoder.com/questionTerminal/c8652e9e5a354b879e2a244200f1eaae