November 28
If you're new to PostgreSQL, the basics can feel intimidating. This guide walks you through essential tasks every beginner should know: starting and stopping PostgreSQL, finding configuration files, connecting with psql, and performing simple administrative commands.
November 27
Indexing is one of the most misunderstood areas of PostgreSQL performance tuning. Developers often assume that “more indexes = faster queries.” This article explains when multiple single-column indexes make sense, when a multi-column index is better, and how PostgreSQL decides.
November 26
Choosing between a JOIN and a subquery is one of the most common points of confusion for SQL developers. Both approaches let you combine data from multiple tables, and often either one will work — but the right choice can improve clarity, performance, and maintainability.
November 26
Common Table Expressions (CTEs) are one of the most useful, least understood features in SQL. Beginners often think they’re “just subqueries with a nicer syntax,” but CTEs are far more powerful than that. This article gives the clearest explanation of what a CTE truly is.
November 24
The Pagila sample database is a popular PostgreSQL training database modeled after a movie rental store. It includes tables for films, actors, customers, rentals, staff, payments, and more. This makes it perfect for learning PostgreSQL!
November 23
We’ll take a tour of the PostgreSQL data directory structure, explaining the purpose of key files and folders that make up a PostgreSQL database cluster.
I’ve spent over 20 years optimizing databases and designing rock-solid data systems. Now I’m sharing what I’ve learned to help others build faster, smarter, and more reliable platforms.
