题解 | #查找所有员工的last_name和first_name以及对应的dept_name#
查找所有员工的last_name和first_name以及对应的dept_name
http://www.nowcoder.com/practice/5a7975fabe1146329cee4f670c27ad55
SELECT last_name, first_name, dept_name FROM employees e LEFT JOIN ( SELECT emp_no, dept_name FROM dept_emp de LEFT JOIN departments d USING(dept_no) ) tb USING(emp_no);
