Add Student Employee
------------------------set the default date format-------------------------
alter session set nls_date_format = 'YYYY-MM-DD';
------------------------Person Information-------------------------
insert into person (first_name, last_name) values('Jane', 'Student'); --111
------------------------Student Information-------------------------
insert into student values(111, 4, '2022-02-01');
------------------------Employee Information-------------------------
insert into employee values(111, '2024-01-19');
------------------------ Information-------------------------
insert into staff values(111, 'Information Systems Ambassador');