Day 2: TypeORM Entities & Columns | PostgreSQL + TypeScript Beginner Tutorial
Welcome to Day 2 of the TypeORM Tutorial Series 🏗️
In this video, we’ll explore Entities and Columns – the building blocks of any TypeORM project. Entities are like blueprints for your database tables, and today you’ll learn how to design them using TypeScript decorators.
👉 What you’ll learn in this video:
✅ What entities are in TypeORM
✅ How to define columns with @Column, @PrimaryGeneratedColumn, etc.
✅ Different PostgreSQL data types (string, number, boolean, JSON, arrays)
✅ Column options like unique, nullable, default, and custom names
✅ Saving and retrieving your first records with repositories
📌 Exercises Covered
Build a User entity and save data
Create a Book entity with validation rules
Experiment with PostgreSQL data types (JSON, arrays, decimals)
Bonus Challenge: Build a Company entity with rich metadata
🎉 By the end of this lesson, you’ll have created real database tables with TypeORM and saved your first records successfully!
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