SELECT emp_no, birth_date, first_name, last_name, gender, hire_date FROM (SELECT emp_no, birth_date, first_name, last_name, gender, hire_date, dense_rank() over (order by hire_date desc) as rk from employees) e where rk = 3 order by emp_no asc; 这题比较难,还是看了官方题解之后才会的。这道题目的难点在于排名为3的员工数量可能不只有一个。如果使用disti...