SQLAlchemy ORM (Models, Relationships, Aggregates) - Python Tutorial for Beginners #36

Learn SQLAlchemy ORM! In this tutorial, you will learn how to map Python classes to database tables, create relationships between models, and build a full project tracker application. What you will learn: - Creating a database engine with create_engine() - Defining models with DeclarativeBase and Column types - Creating and managing sessions with sessionmaker - Adding, querying, updating, and deleting records - Using filter_by() and filter() for queries - Defining one-to-many relationships with ForeignKey - Navigating relationships with back_populates - Seeding data through relationship assignment - Using session.get() for primary key lookups - Aggregate queries with func.count() and func.sum() - Joining tables with .join() and .group_by() - Wrapping ORM operations in reusable functions Timestamps: 0:00 - Introduction 0:33 - ORM Basics Explained 1:00 - ORM Basics Demo 4:48 - ORM Relationships Explained 5:15 - ORM Relationships Demo 9:30 - Project Tracker Explained 9:57 - Project Tracker Demo 15:11 - Recap 15:51 - End Source code: https://github.com/GoCelesteAI/python_sqlalchemy_orm Previous: Lesson 35 - SQLite Part 2 https://youtu.be/PLACEHOLDER_L35 Next: Lesson 37 - CLI Applications Coming soon! --- Python Tutorial for Beginners playlist - Learn Python from scratch with hands-on coding demos. #Python #SQLAlchemy #ORM #PythonTutorial #LearnPython #PythonForBeginners #CodingTutorial #Database #Models #Relationships