题解 | #查找在职员工自入职以来的薪水涨幅情况#

select s1.emp_no,
s1.salary - s2.salary growth
from
# 查询当前工资
(select emp_no,salary
from salaries
where to_date = '9999-01-01') s1
join
# 查询入职工资
(select e.emp_no,s.salary
from employees e join salaries s
on e.emp_no = s.emp_no
where e.hire_date = s.from_date) s2
on s1.emp_no = s2.emp_no
order by growth