1创建一个员工表

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`));

2插入数据

insert into employees values(10007,1995-02-18,'ge','yao','M',1998-09-18)；

insert into employees values(10008,'1948-02-18','ge','ao','M','1997-09-18');

insert into employees values(10009,'1946-12-18','rge','ao','M','2017-09-18');

3 [编程题]查找最晚入职员工的所有信息

select * from employees

where hire_date =

(select max(hire_date) from employees)

4插入数据

insert into employees values(10011,'1988-01-18','yao','aro','M','1999-07-18');

insert into employees values(10012,'1976-12-18','wang','ao','W','2017-01-18');

insert into employees values(10010,'1945-01-18','yao','aro','W','1999-07-18');

5查找入职员工时间排名倒数第三的员工所有信息

select * from employees

where hire_date = (

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

)