Why ORM maps Python to database in Django - Quick Recap

Recall & Review

beginner

What does ORM stand for in Django?

ORM stands for Object-Relational Mapping. It helps connect Python code with database tables.

beginner

Why do we use ORM instead of writing raw SQL in Django?

ORM lets you work with Python objects instead of SQL queries. This makes code easier to write, read, and maintain.

intermediate

How does ORM map Python classes to database tables?

Each Python class represents a table. Each attribute in the class represents a column in that table.

beginner

What is one real-life example of ORM mapping?

Think of a contact list app: a Python class 'Contact' maps to a 'contacts' table in the database. Each contact's name and phone number are columns.

intermediate

How does ORM improve database portability?

ORM lets you switch databases (like SQLite to PostgreSQL) without changing Python code much, because it handles SQL differences for you.

What does Django's ORM allow you to do?

A Write HTML pages automatically

B Write Python code to interact with the database

C Create CSS stylesheets

D Compile Python to machine code

Django's ORM lets you use Python code to create, read, update, and delete database records.

In ORM, a Python class usually represents what in the database?

A A database index

B A database user

C A SQL query

D A database table

Each Python class corresponds to a table in the database.

Why is ORM helpful for beginners?

A It hides complex SQL and lets you use simple Python code

B It teaches you advanced SQL commands

C It replaces Python with SQL

D It requires no database at all

ORM simplifies database work by letting you use Python instead of writing SQL.

What happens if you change the database backend in Django when using ORM?

A You usually don’t need to change your Python code

B You must rewrite all SQL queries manually

C Your app will stop working

D You need to change your HTML templates

ORM abstracts database differences, so switching backends often requires little or no code change.

Which of these is NOT a benefit of using ORM?

A Faster development with Python code

B Automatic mapping of classes to tables

C Direct control over low-level SQL optimizations

D Easier to maintain and read code

ORM may limit low-level SQL tuning; it focuses on ease and speed, not always on fine-tuned SQL control.

Explain in your own words why Django uses ORM to map Python code to the database.

Think about how Python objects relate to database tables.

Describe a simple real-life example where ORM helps connect Python code to a database.

Imagine a list of items stored in a database.