Oracle PL/SQL/Object Oriented Database/DEREF

DEREF (Dereference) the Row Addresses

SQL> -- DEREF (Dereference) the Row Addresses
SQL>
SQL> CREATE OR REPLACE TYPE address_obj as OBJECT(
  2        street VARCHAR2(20),
  3        city VARCHAR2(20),
  4        state CHAR(2),
  5        zip CHAR(5));
  6  /
Type created.
SQL>
SQL> CREATE TABLE address_table OF ADDRESS_OBJ;
Table created.
SQL>
SQL> CREATE TABLE client (name VARCHAR2(20),
  2    address REF address_obj scope is address_table);
Table created.
SQL>
SQL>
SQL>
SQL> INSERT INTO client VALUES ("Jones",null);
1 row created.
SQL>
SQL> SELECT * FROM client;
NAME      ADDRESS
--------- --------------------------------------------------
Jones
SQL>
SQL> SELECT name, DEREF(address) FROM client;
NAME
---------
DEREF(ADDRESS)(STREET, CITY, STATE, ZIP)
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Jones

SQL>
SQL>
SQL> drop table client;
Table dropped.
SQL>
SQL> drop table address_table;
Table dropped.
SQL>