select sa.emp_no,sa.salary,sa.from_date,sa.to_date,de.dept_no from dept_manager de left join salaries sa on sa.emp_no=de.emp_no order by sa.emp_no asc
左连接+排序规则+筛选字段顺序
select sa.emp_no,sa.salary,sa.from_date,sa.to_date,de.dept_no from dept_manager de left join salaries sa on sa.emp_no=de.emp_no order by sa.emp_no asc
左连接+排序规则+筛选字段顺序