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 t.title,AVG(s.salary) from titles t LEFT JOIN salaries s ON t.emp_no s.emp_no GROUP BY t.title ORDER BY AVG(s.salary) ASC