答案:
SELECT title,AVG(s.salary) as a from titles t INNER JOIN salaries s WHERE t.emp_no=s.emp_no GROUP BY title ORDER BY a asc
按title分组,计算平均工资并且按平均工资排序
答案:
SELECT title,AVG(s.salary) as a from titles t INNER JOIN salaries s WHERE t.emp_no=s.emp_no GROUP BY title ORDER BY a asc
按title分组,计算平均工资并且按平均工资排序