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
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SELECT title, avg(s.salary) FROM titles as t JOIN salaries as s on t.emp_no = s.emp_no GROUP BY title ORDER BY avg(s.salary);