Selection of individual attributes of type of object in SQL

I have an object of type with two attributes. I would like to individually select them as a normal select, not a format of xml column. Here is the configuration.

Oracle 11g Release 2

CREATE CLUSTER employee ( emp_id NUMBER(10) ) hashkeys 1000 ;

CREATE TABLE employee
(
  emp_id     NUMBER(10) ,
  ename      VARCHAR2(16),
  birthdate  DATE,
  hiredate   DATE,
  CONSTRAINT pk_employee PRIMARY KEY (emp_id)
)
CLUSTER employee (emp_id);

CREATE TABLE dependent
(
  emp_id         NUMBER(10),
  dependent_name VARCHAR2(30) NOT NULL,
  birthdate      DATE,
  CONSTRAINT pk_dependent  PRIMARY KEY (emp_id, dependent_name),
  CONSTRAINT fk_dependent  FOREIGN KEY (emp_id) REFERENCES employee
)
CLUSTER employee (emp_id);

INSERT INTO employee  VALUES (1,'WILLIAM H SMITH','01-JAN-1977','01-JAN-1997') ;
INSERT INTO dependent VALUES (1, 'JANE E SMITH','01-JAN-2007');
commit;

CREATE OR REPLACE TYPE dependent_rec AS OBJECT (dependent_name VARCHAR2(30), birthdate DATE)
/

CREATE OR REPLACE TYPE dependent_tab AS TABLE OF dependent_rec
/

create or replace view vw_emps as
SELECT
  emp_id,
  ename,
  birthdate,
  CAST
  (
    MULTISET
    (
      SELECT
        dependent_name,
        birthdate
      FROM dependent
      WHERE emp_id = e.emp_id
    )
    AS dependent_tab
  ) dependent
FROM
      employee e
/

select * from vw_emps where emp_id = 1;

    EMP_ID ENAME            BIRTHDATE
---------- ---------------- ---------
DEPENDENT(DEPENDENT_NAME, BIRTHDATE)
----------------------------------------------------------
         1 WILLIAM H SMITH  01-JAN-77
DEPENDENT_TAB(DEPENDENT_REC('JANE E SMITH', '01-JAN-07'))



--This is the results that I want:

EMP_ID   ENAME            BIRTHDATE    DEPENDENT_NAME
------   -------------    -----------  ------------------
     1   WILLIAM H SMITH  01-JAN-1977  JANE E SMITH

I tried the rating by point - dependent.dependent_name but that a does not. All of the suggestions.

1. to access a collection in SQL, you must convert it to a table with the operator TABLE():

Select ename, dt. Vw_emps DEPENDENT_NAME, dt (vw_emps.dependent) TABLE where emp_id = 1

2. to access a subject field in SQL, you should always give a table name or alias, not only the name of the column. I.e. table.column.field

create the emp_dep table (emp_id number (10), dep DEPENDENT_REC);

insert into emp_dep values (1, DEPENDENT_REC ('JACK SMITH ", 1 February 1995"));

Select emp_id, emp_dep dep.dependent_name;

*

ERROR on line 1:

ORA-00904: "DEP". "" DEPENDENT_NAME ": invalid identifier

Select emp_id, emp_dep ed ed.dep.dependent_name

EMP_ID DEP. DEPENDENT_NAME

---------- ------------------------------

1 JACK SMITH

The first query gave the name of the column without a table name or alias, if it does not. The second gave table.column.field and worked.

Tags: Database

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    >
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    >
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