delete from emp;
insert into emp (name, tel) values('鈴木義男', '11-1111');
insert into emp (code, name) values(564002, '斎藤洋子');
insert into emp (name, age) values('山田美樹', 33);
insert into emp (code, name, tel) values(564004, '田中秀明', '44-4444');