1.先查询每个员工的编号、部门和薪水 SELECT A.dept_no,A.emp_no,B.salary FROM dept_emp A JOIN salaries B ON A.emp_no = B.emp_no 2.在查询出每个部门最高的薪水 SELECT A.dept_no,MAX(salary) salary FROM dept_emp A JOIN salaries B ON A.emp_no = B.emp_no GROUP BY A.dept_no 3.将上述两个查询作为两张表联合查询,连接条件是dept_...