[SQL]实战之查找员工编号emp_no为10001其自入职以来的薪水salary涨幅值growth

题目描述

查找员工编号emp_no为10001其自入职以来的薪水salary涨幅值growth
CREATE TABLE salaries (
emp_no int(11) NOT NULL,
salary int(11) NOT NULL,
from_date date NOT NULL,
to_date date NOT NULL,
PRIMARY KEY (emp_no,from_date));

解题思路

最大值减去最小值即可

AC代码

SELECT (MAX(salary) - MIN(salary)) AS grouth FROM salaries WHERE emp_no = 10001