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Supabase Backend as a Service · Lesson

Relationships and Foreign Keys

Connect tables together using foreign keys to model one-to-many and many-to-many relationships in your Supabase Postgres database.

Why Relationships Matter

Real data is connected: a user has many posts, an order has many items. Relationships link rows across tables so you avoid duplicating data.

What Is a Foreign Key?

A foreign key is a column that points to the primary key of another table. It enforces that the referenced row actually exists.

All lessons in this course

  1. Designing Database Schemas
  2. Creating Tables and Columns
  3. Basic Data Insertion & Querying
  4. Relationships and Foreign Keys
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