#建表
create table department(
id int,
name varchar(20) 
);

create table employee(
id int primary key auto_increment,
name varchar(20),
sex enum('male','female') not null default 'male',
age int,
dep_id int
);

#插入数据
insert into department values
(200,'技术'),
(201,'人力资源'),
(202,'销售'),
(203,'运营');

insert into employee(name,sex,age,dep_id) values
('mark','male',18,200),
('jack','female',48,201),
('xiaowang','male',38,201),
('xiaozhang','female',28,202),
('xiaoliiu','male',18,200),
('alex','female',18,204)
;