SQL实战之找出所有员工当前薪水salary情况

题目描述

找出所有员工当前(to_date=‘9999-01-01’)具体的薪水salary情况，对于相同的薪水只显示一次,并按照逆序显示
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

DISTINCT关键字和排序的使用

AC代码

SELECT DISTINCT(salary) FROM salaries WHERE to_date = '9999-01-01' ORDER BY salary DESC