#建表
create table score (
	id int(10) unique not null auto_increment,
    stu_id int(10) not null,
    c_name varchar(20),
    grade int(10),
    primary key(id)
);

#插入2行数据
insert into score values(null,906,'计算机',90);
insert into score values(null,906,'英语',85);