SELECTing Only One Column in the Composite : Select « Object Oriented « Oracle PL/SQL Tutorial

1. Oracle PL/SQL Tutorial
2. Object Oriented
3. Select

SQL>
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 emp (
  2  empno NUMBER(3),
  3  name VARCHAR2(20),
  4  address ADDRESS_OBJ)
  5  /

Table created.

SQL>
SQL> INSERT INTO emp VALUES (101, 'A',ADDRESS_OBJ('1 St.','M','AL','36608'));

1 row created.

SQL>
SQL> select * from emp;

     EMPNO NAME                 ADDRESS(STREET, CITY, STATE, ZIP)
---------- -------------------- --------------------------------------------------
       101 A                    ADDRESS_OBJ('1 St.', 'M', 'AL', '36608')

SQL>
SQL> select address from emp;

ADDRESS(STREET, CITY, STATE, ZIP)
--------------------------------------------------
ADDRESS_OBJ('1 St.', 'M', 'AL', '36608')

SQL> SELECT name, e.address.city
  2  FROM emp e;

NAME                 ADDRESS.CITY
-------------------- --------------------
A                    M

SQL>
SQL>
SQL> drop table emp;

Table dropped.

SQL>
SQL> drop type ADDRESS_OBJ;

Type dropped.

SQL>
SQL>
SQL>