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
http://www.nowcoder.com/practice/c8652e9e5a354b879e2a244200f1eaae
SELECT t.title, AVG(salary) AS avg FROM titles as t INNER JOIN salaries as s ON t.emp_no=s.emp_no AND t.to_date='9999-01-01' AND s.to_date='9999-01-01' GROUP BY t.title ORDER BY avg;
目前可运行版本。
