sql操作第一篇

• 查找最晚入职员工的所有信息

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`));

解法：

select * from employees 
where hire_date = (select max(hire_date) from employees);

select * from employees order by hire_date desc limit 0,1

select top 1 * from employees order by hire_date desc

• 查找入职员工时间排名倒数第三的员工所有信息

select * from employees order by hire_date desc limit 2,1