How to Use Flask-SQLAlchemy to Interact with Databases in a Flask App (2025)

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Want to **integrate a database** into your Flask application? **Flask-SQLAlchemy** is the go-to ORM (Object Relational Mapper) for working with databases in Flask. In this tutorial, you’ll learn how to **set up and use Flask-SQLAlchemy** to efficiently manage and interact with databases in your Flask app. Whether you're building a simple web app or a full-fledged API, this guide will walk you through everything from **database setup** to performing CRUD operations (Create, Read, Update, Delete) using **Flask-SQLAlchemy**. ### 🔹 **What You’ll Learn in This Video:** ✅ What is **Flask-SQLAlchemy**, and why should you use it? ✅ How to install and configure **Flask-SQLAlchemy** ✅ Setting up a **SQLite / PostgreSQL / MySQL** database ✅ Creating database models using **SQLAlchemy ORM** ✅ Running **migrations** and initializing the database ✅ Performing CRUD operations (Create, Read, Update, Delete) ✅ Querying the database using Flask-SQLAlchemy ✅ Best practices for using **Flask and databases efficiently** ### 🔹 **Why Use Flask-SQLAlchemy?** Flask-SQLAlchemy simplifies database interactions in Flask by: 🔹 Allowing you to use **Python objects instead of raw SQL queries** 🔹 Supporting multiple database engines (**SQLite, PostgreSQL, MySQL, etc.**) 🔹 Providing built-in query support for **efficient database interactions** 🔹 Making it easier to perform **database migrations** --- ### **🚀 Step-by-Step Implementation** #### **1️⃣ Install Flask-SQL