题解 | #查找在职员工自入职以来的薪水涨幅情况#

with tiaojian as (
select 
emp_no
from salaries
where
to_date="9999-01-01"
)

select 
t.emp_no,
sum(t.pt-t.salary) as growth
from(
select 
t.emp_no,
salary,
lead(salary,1)over(partition by t.emp_no order by to_date) as pt
from tiaojian t left join salaries s 
on t.emp_no=s.emp_no
) as t
group by t.emp_no
order by growth