oracle11g - How do I define object-references between tables in object-relational database feature of oracle SQL developer

Question

I successfully created an EmployeeType in Oracle 11g with the following atrributes;

emp_id   VARCHAR2(5)
title   VARCHAR(15)
firstname VARCHAR(20)
surname   VARCHAR(20)
address Addresstype
tel_no  ARRAY(3) of VARCHAR(15)
get_address() VARCHAR2()

and was told to create DepartmentType in Oracle 11g with the following attributes

dept_id  VARCHAR2(3)
location AddressType
manager  REF Employee

but my problem now is I don't know how to use the object-relational REF construct to define object-references between the two tables for relating Departments to Employees so that I can create table which will store department details and insert rows.

Answer 1

您可以使用一些 ORM（对象关系映射）框架，您可以在此处阅读

什么是对象关系映射框架？

这是一个很大的话题，或者您可以设法自己找到一种方法，但是您必须知道，关系数据库只是带有数据的行，与面向对象的对象无关，您可以将其作为一种方法存储数据。

我希望这有帮助。