List to list using object references : Ref « Object Oriented Database « Oracle PL / SQL

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

List to list using object references

    
SQL> CREATE OR REPLACE TYPE bookType AS OBJECT
  2     (book_id          VARCHAR2(10),
  3      book_title       VARCHAR2(30))
  4  /

Type created.

SQL>
SQL> CREATE OR REPLACE TYPE authorType AS OBJECT
  2     (author_id        VARCHAR2(10),
  3      author_name      VARCHAR2(30))
  4  /

Type created.

SQL>
SQL> CREATE TABLE Book OF bookType
  2     (book_id NOT NULL,
  3      PRIMARY KEY (book_id));

Table created.

SQL>
SQL> CREATE TABLE Author OF authorType
  2     (author_id NOT NULL,
  3      PRIMARY KEY (author_id));

Table created.

SQL>
SQL> CREATE TABLE Write
  2     (Book             REF bookType,
  3      Index_Book       NUMBER NOT NULL,
  4      Author           REF authorType);

Table created.

SQL>
SQL> CREATE TABLE Written_By
  2     (Author           REF authorType,
  3      Index_Author     NUMBER NOT NULL,
  4      Book             REF bookType);

Table created.

SQL>
SQL>
SQL> drop type bookType force;

Type dropped.

SQL> drop type authorType force;

Type dropped.

SQL>
SQL>
SQL> drop table Book;

Table dropped.

SQL> drop table Author;

Table dropped.

SQL> drop table Write;

Table dropped.

SQL> drop table Written_By;

Table dropped.

   
    
    
    
  

Related examples in the same category