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 TABLEsalaries(

emp_noint(11) NOT NULL,

salaryint(11) NOT NULL,

from_datedate NOT NULL,

to_datedate 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