Implementation of one to many using object references : Object Table « Object Oriented Database « Oracle PL / SQL






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

Implementation of one to many using object references

   

SQL>
SQL> CREATE OR REPLACE TYPE personType AS OBJECT
  2      (person_id        VARCHAR2(10),
  3       person_name      VARCHAR2(30))
  4      /


SQL>
SQL> CREATE OR REPLACE TYPE courseType AS OBJECT
  2      (course_id        VARCHAR2(10),
  3       course_name      VARCHAR2(30),
  4       course_Programmer  REF personType)
  5      /

Type created.

SQL>
SQL>
SQL>
SQL>
SQL> CREATE TABLE Programmer OF personType
  2      (person_id NOT NULL,
  3       PRIMARY KEY (person_id));

Table created.

SQL>
SQL>
SQL> CREATE TABLE Course OF courseType
  2      (course_id NOT NULL,
  3       PRIMARY KEY (course_id));

Table created.

SQL>
SQL>
SQL>
SQL>
SQL> drop type personType force;

Type dropped.

SQL>
SQL>
SQL>
SQL> drop type courseType force;

Type dropped.

SQL>
SQL>
SQL>
SQL> drop table Programmer;

Table dropped.

SQL>
SQL>
SQL> drop table Course;

Table dropped.

SQL>








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