SELECTing Individual Columns in Table that Contains Row Objects : Object Table « Object Oriented « Oracle PL/SQL Tutorial

SQL>
SQL>
SQL> CREATE OR REPLACE TYPE addressType 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 addressType
  2  /

Table created.

SQL>
SQL> CREATE TABLE client (name VARCHAR2(20),
  2    address REF addressType scope is address_table);

Table created.

SQL>
SQL>
SQL> DESC client;
 Name      Null?    Type
 ---------
 NAME               VARCHAR2(20)
 ADDRESS            REF OF ADDRESSTYPE

SQL>
SQL> INSERT INTO client
  2  SELECT 'Walsh', REF(aa)
  3  FROM address_table aa
  4  WHERE zip = '32563';

0 rows created.

SQL>
SQL> SELECT c.name, c.address.city
  2  FROM client c;

no rows selected

SQL>
SQL>
SQL> drop table address_table;

Table dropped.

SQL> drop table client;

Table dropped.

SQL>
SQL> drop type addressType;

Type dropped.

SQL>

32.9.Object Table
	32.9.1.	You can also use an object type to define an entire table, and the table is known as an object table.
	32.9.2.	Inserting a row into an object table
	32.9.3.	One-step INSERTs into a Table that Contains Row Objects
	32.9.4.	INSERT Values into a Table that Contains Row Objects (TCRO)
	32.9.5.	Insert data just as one would ordinarily do with a common SQL table:
	32.9.6.	SELECTing Individual Columns in Table that Contains Row Objects
	32.9.7.	Selecting Rows from the object Table
	32.9.8.	SELECT from the object-oriented table
	32.9.9.	Updating a Row in the object Table
	32.9.10.	UPDATE a Table that Contains Row Objects (TCRO)
	32.9.11.	Accessing the object table by reference
	32.9.12.	Create a table based on an Object with methods
	32.9.13.	Alter table to add a user-defined type column