自定义记录报错：PLS-00103: Encountered the symbol "NAME_TYPE" when expecting one of the

[theoffspring]

我把书上的例子copy进来报错：
ORA-06550: line 7, column 15:
PLS-00103: Encountered the symbol "NAME_TYPE" when expecting one of the following:

) ,

pl/sql:

DECLARE
   TYPE name_type IS RECORD
      (first_name VARCHAR2(15),
       last_name  VARCHAR2(30));

   TYPE person_type IS
      (name   name_type,
       street VARCHAR2(50),
       city   VARCHAR2(25),
       state  VARCHAR2(2),
       zip    VARCHAR2(5));

   person_rec person_type;


DECLARE
   TYPE name_type IS RECORD
      (first_name VARCHAR2(15),
       last_name  VARCHAR2(30));

   TYPE person_type IS RECORD
      (name   name_type,
       street VARCHAR2(50),
       city   VARCHAR2(25),
       state  VARCHAR2(2),
       zip    VARCHAR2(5));

   person_rec person_type;

BEGIN
   SELECT first_name, last_name, street_address, city, state, zip
     INTO person_rec.name.first_name, person_rec.name.last_name,  
          person_rec.street, person_rec.city, person_rec.state, 
          person_rec.zip
     FROM student 
     JOIN zipcode USING (zip)
    WHERE rownum < 2;

   DBMS_OUTPUT.PUT_LINE ('Name:   '||
      person_rec.name.first_name||' '||person_rec.name.last_name);
   DBMS_OUTPUT.PUT_LINE ('Street: '||person_rec.street);
   DBMS_OUTPUT.PUT_LINE ('City:   '||person_rec.city);
   DBMS_OUTPUT.PUT_LINE ('State:  '||person_rec.state);
   DBMS_OUTPUT.PUT_LINE ('Zip:    '||person_rec.zip);
END;

[theoffspring]

第七行就是这个：
(name name_type,

[theoffspring]

  1 DECLARE
  2     TYPE name_type IS RECORD
  3        (first_name VARCHAR2(15),
  4         last_name  VARCHAR2(30));
  5
  6     TYPE person_type IS
  7        (name   name_type,
  8         street VARCHAR2(50),
  9         city   VARCHAR2(25),
 10         state  VARCHAR2(2),
 11         zip    VARCHAR2(5));
 12
 13     person_rec person_type;
 14
 15
 16  DECLARE
 17     TYPE name_type IS RECORD
 18        (first_name VARCHAR2(15),
 19         last_name  VARCHAR2(30));
 20
 21     TYPE person_type IS RECORD
 22        (name   name_type,
 23         street VARCHAR2(50),
 24         city   VARCHAR2(25),
 25         state  VARCHAR2(2),
 26         zip    VARCHAR2(5));
 27
 28     person_rec person_type;
 29
 30  BEGIN
 31     SELECT first_name, last_name, street_address, city, state, zip
 32       INTO person_rec.name.first_name, person_rec.name.last_name,
 33            person_rec.street, person_rec.city, person_rec.state,
 34            person_rec.zip
 35       FROM student
 36       JOIN zipcode USING (zip)
 37      WHERE rownum < 2;
 38
 39     DBMS_OUTPUT.PUT_LINE ('Name:   '||
 40        person_rec.name.first_name||' '||person_rec.name.last_name);
 41     DBMS_OUTPUT.PUT_LINE ('Street: '||person_rec.street);
 42     DBMS_OUTPUT.PUT_LINE ('City:   '||person_rec.city);
 43     DBMS_OUTPUT.PUT_LINE ('State:  '||person_rec.state);
 44     DBMS_OUTPUT.PUT_LINE ('Zip:    '||person_rec.zip);
 45  END;

[iqlife]

TYPE name_type IS RECORD
18 (first_name VARCHAR2(15),
19 last_name VARCHAR2(30));
20
21 TYPE person_type IS RECORD
22 (name name_type,
可以RECORD嵌套RECORD?
只知道常用的是TABLE类型嵌套RECORD类型?有回答的?