create table people(
employee_id number(9),
first_name varchar2(15),
last_name varchar2(20),
email varchar2(25),
constraint pk_people primary key (employee_id)
);
insert into people values (1, 'T', 'Kyte', 'YourName@q.com');
insert into people values (2, 'S', 'Dillon', 'sdillon@q.com');
insert into people values (3, 'C', 'Beck', 'clbeck@q.com');
select * from people;
alter table people
set unused (first_name, last_name);
drop table people;