create table students(
id int primary key ,
name varchar(12)
);
insert into students(id,name)values(1,'aaa');
insert into students(id,name)values(2,'bbb');
insert into students(id,name)values(3,'ccc');
select * from students;
insert into students2(id,name)values(1,'aaa');
insert into students2(id,name)values(2,'bbb');
insert into students2(id,name)values(3,'ccc');
insert into students2(id,name)values(4,'ddd');