DEREF (Dereference) the Row Addresses : DEREF « Object Oriented Database « Oracle PL / SQL

1. Oracle PL / SQL
2. Object Oriented Database
3. 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>
           
       

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