1、描述
有一个薪水表,salaries简况如下:
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:
2、题目建表
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');
3、答案
select distinct salary
from salaries
order by salary desc;