牛客：数据库实战—1—查找最晚入职员工的所有信息、查找入职员工时间排名倒数第三的员工所有信息

CREATE TABLE `employees` (
`emp_no` int(11) NOT NULL,
`birth_date` date NOT NULL,
`first_name` varchar(14) NOT NULL,
`last_name` varchar(16) NOT NULL,
`gender` char(1) NOT NULL,
`hire_date` date NOT NULL,
PRIMARY KEY (`emp_no`));

SELECT * FROM employees ORDER BY hire_date DESC LIMIT 1;

SELECT * FROM employees WHERE hire_date = (SELECT MAX(hire_date) FROM employees);

SELECT * FROM employees WHERE hire_date = (
     SELECT DISTINCT hire_date FROM employees ORDER BY hire_date DESC LIMIT 2,1)