select e.emp_no,(ss.salary-s.salary) as growth
from employees e
left join salaries s on e.emp_no = s.emp_no
left join salaries ss on s.emp_no = ss.emp_no
where s.from_date = e.hire_date and ss.to_date = '9999-01-01' and e.emp_no = s.emp_no and ss.emp_no = e.emp_no
order by growth