GitHub user boringcollege released 'Postgres by Example,' a practical guide to PostgreSQL that trades theory for working code. The repository skips marketing copy in favor of annotated SQL examples that demonstrate database concepts directly. Unlike traditional documentation, this resource assumes you have PostgreSQL running and want to see queries in action immediately.

The guide walks through fundamentals like SELECT statements, WHERE clauses, and JOIN operations before advancing to transactions, indexes, and security. Each section builds on the previous one, covering data types, constraints, and aggregation functions through hands-on examples. The author targets the current stable PostgreSQL release, ensuring compatibility with modern installations.

Released under CC BY 4.0, the material can be freely shared and adapted for educational purposes. This approach addresses a common pain point for developers learning relational databases: connecting abstract concepts to actual query syntax. The annotated examples show not just what works, but why certain patterns matter for performance and data integrity.

Whether you're building your first database schema or refreshing forgotten SQL skills, this resource provides immediately applicable knowledge without wading through dense specification documents.