What is an ORM? How does Django ORM work?

I-Hub Talent: The Best Full Stack Python Institute in Hyderabad

If you're looking for the best Full Stack Python training institute in Hyderabad, I-Hub Talent is your ultimate destination. Known for its industry-focused curriculum, expert trainers, and hands-on projects, I-Hub Talent provides top-notch Full Stack Python training to help students and professionals master Python, Django, Flask, Frontend, Backend, and Database Technologies.

At I-Hub Talent, you will gain practical experience in HTML, CSS, JavaScript, React, SQL, NoSQL, REST APIs, and Cloud Deployment, making you job-ready. The institute offers real-time projects, career mentorship, and placement assistance, ensuring a smooth transition into the IT industry.

Join I-Hub Talent’s Full Stack Python course in Hyderabad and boost your career with the latest Python technologies, web development, and software engineering skills. Elevate your potential and land your dream job with expert guidance and hands-on training!

What is an ORM?

ORM stands for Object-Relational Mapping. It’s a programming technique that lets you interact with a relational database using objects instead of writing raw SQL queries. ORMs map database tables to classes and rows to objects, making database operations more intuitive and Pythonic.

How Does Django ORM Work?

  1. Models as Python Classes:
    In Django, each database table is represented by a Python class called a model (defined in models.py). Each attribute of the class corresponds to a database field (column).

  2. Mapping to Database:
    Django’s ORM translates these model classes into SQL commands under the hood. When you create, update, or delete a model instance, Django generates and executes the appropriate SQL.

  3. CRUD Operations via Python:

    • Create:

    • Read:

    • Update:

    • Delete:

  4. QuerySet API:
    Django ORM provides a powerful, chainable QuerySet API to filter, sort, and aggregate data easily.

  5. Migrations:
     When you change models, Django uses migrations to alter the database schema safely.

    6. Benefits:

    • No need to write SQL directly.

    • Database-agnostic code (works with SQLite, PostgreSQL, MySQL, etc.).

    • Clean, maintainable code that integrates seamlessly with Python.

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