SQL>
SQL> create table people(
2 employee_id number(9),
3 first_name varchar2(15),
4 last_name varchar2(20),
5 email varchar2(25),
6 constraint pk_people primary key (employee_id)
7 );
Table created.
SQL>
SQL> insert into people values (1, 'T', 'Kyte', 'Yo[email protected]');
1 row created.
SQL>
SQL> insert into people values (2, 'S', 'Viper', 'sd[email protected]');
1 row created.
SQL>
SQL> insert into people values (3, 'C', 'Beck', 'cl[email protected]');
1 row created.
SQL>
SQL> commit;
Commit complete.
SQL>
SQL> select * from people;
EMPLOYEE_ID FIRST_NAME LAST_NAME EMAIL
----------- --------------- -------------------- -------------------------
1 T Kyte [email protected]
2 S Viper [email protected]
3 C Beck [email protected]
SQL>
SQL> alter table people
2 add (
3 phone_number varchar2(10)
4 );
Table altered.
SQL>
SQL> select * from people;
EMPLOYEE_ID FIRST_NAME LAST_NAME EMAIL PHONE_NUMB
----------- --------------- -------------------- ------------------------- ----------
1 T Kyte [email protected]
2 S Viper [email protected]
3 C Beck [email protected]
SQL>
SQL> drop table people;
Table dropped.
SQL>
|
|
