题解 | #查找所有员工的名字对应的dept_name#
查找所有员工的last_name和first_name以及对应的dept_name
https://www.nowcoder.com/practice/5a7975fabe1146329cee4f670c27ad55
select e.last_name,e.first_name,a.dept_name from employees as e left join ( select de.emp_no,de.dept_no,ds.dept_name from departments as ds right join dept_emp as de on ds.dept_no = de.dept_no) a on e.emp_no = a.emp_no