题解 | #查找在职员工自入职以来的薪水涨幅情况#
查找在职员工自入职以来的薪水涨幅情况
http://www.nowcoder.com/practice/fc7344ece7294b9e98401826b94c6ea5
select后使用子查询即可
select e.emp_no,
(
(select s2.salary from salaries s2
where s2.emp_no=e.emp_no and s2.to_date='9999-01-01')
-
(select s1.salary from employees e1,salaries s1
where e1.emp_no=s1.emp_no and s1.from_date=e1.hire_date and e1.emp_no=e.emp_no)
)
as growth
from employees e,salaries s
where e.emp_no=s.emp_no and to_date='9999-01-01'
group by e.emp_no
order by growth
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