SQL202 找出所有员工当前薪水salary情况

题目描述

有一个薪水表，salaries简况如下:

emp_no	salary	from_date	to_date
10001	72527	2002-06-22	9999-01-01
10002	72527	2001-08-02	9999-01-01
10003	43311	2001-12-01	9999-01-01

请你找出所有员工具体的薪水salary情况，对于相同的薪水只显示一次,并按照逆序显示，以上例子输出如下:

salary
72527
43311

SQL Schema

drop table if exists  `salaries` ; 
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`));
INSERT INTO salaries VALUES(10001,72527,'2002-06-22','9999-01-01');
INSERT INTO salaries VALUES(10002,72527,'2001-08-02','9999-01-01');
INSERT INTO salaries VALUES(10003,43311,'2001-12-01','9999-01-01');

答案

SELECT DISTINCT
    salary
FROM
    salaries
ORDER BY
    salary DESC;