Object Based Database Assignment Help And Online Tutoring

Object Based Database is also known as Object-Oriented database Management System. It is a database management system in which information is represented in the form of objects as used in Object-oriented programming. It has lots of features like persistence, support of transactions, simple querying of bulk data, concurrent access, resilience, security etc.

Object-oriented database are designed to work with object-oriented programming language such as C, C++, Python and many more. Objects are basically consists of the following:

• Attributes:
  Attributes are data which defines characteristic of object.
  
• Methods:
  It is used to define the behavior of an object.
  

Example of Object Oriented Database

Object-oriented databases (OODBs) are databases that use object-oriented programming concepts to store and manage data. They are particularly useful when dealing with complex data structures and relationships. Here's a simplified example of an object-oriented database:

Let's say we're building a library management system, and we want to represent books, authors, and library members using object-oriented concepts. In this example, we'll create classes for these entities and show how they could be stored and managed in an OODB.

Python Code

# Define a class for Author
class Author:
    def __init__(self, author_id, name, birthdate):
        self.author_id = author_id
        self.name = name
        self.birthdate = birthdate

# Define a class for Book
class Book:
    def __init__(self, book_id, title, publication_year, author):
        self.book_id = book_id
        self.title = title
        self.publication_year = publication_year
        self.author = author

# Define a class for LibraryMember
class LibraryMember:
    def __init__(self, member_id, name, email):
        self.member_id = member_id
        self.name = name
        self.email = email
        self.borrowed_books = []  # A list to store borrowed books

# Create instances of Author, Book, and LibraryMember
author1 = Author(1, "J.K. Rowling", "July 31, 1965")
book1 = Book(101, "Harry Potter and the Sorcerer's Stone", 1997, author1)
book2 = Book(102, "Harry Potter and the Chamber of Secrets", 1998, author1)

member1 = LibraryMember(1001, "John Doe", "john@example.com")
member2 = LibraryMember(1002, "Jane Smith", "jane@example.com")

# Add borrowed books to LibraryMembers
member1.borrowed_books.append(book1)
member2.borrowed_books.append(book2)

# Simulate querying the OODB
# For example, to find all books borrowed by member1:
books_borrowed_by_member1 = member1.borrowed_books

# To find the author of a book:
author_of_book1 = book1.author

# These are simplified representations of how an OODB might work, using Python classes to model real-world entities and their relationships. In a real OODB system, you would have a more robust data management and querying system.

This example demonstrates how you can use classes to represent objects (authors, books, and library members) and their relationships in an object-oriented database. Each class has attributes that store data about the object, and you can perform operations like querying which books a library member has borrowed or finding the author of a book. In a real-world scenario, an OODB system would provide more advanced features for data storage and retrieval.

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