select departments.dept_no,dept_name,title,count(title) from departments,dept_emp,titles where departments.dept_no=dept_emp.dept_no and dept_emp.emp_no=titles.emp_no group by title,departments.dept_no ORDER by departments.dept_no ASC,title asc; /* 如果只按dept_no分组,那么每个dept_no只会出现一条记录, 则不能体现同一dept_n...