SQL8 - 找出所有员工当前具体的薪水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`));

 

题目描述:

简单

 

解答:

select distinct salary
from salaries 
where to_date='9999-01-01'
order by salary desc