Table Oracle PLSQL Tutorial

SQL>
SQL> create table it
  2   (c1 number primary key,
  3    c2 number,
  4    c3 number);
SQL>
SQL> alter table it add constraint it_fk foreign key (c2) references emp disable;
SQL>
SQL> select object_name as name, object_id
  2  from user_objects
  3  where object_name in ('T', 'IT');
IT                                                                                                                            14971
1 row selected.