SQL Fundamentals

Mastering PostgreSQL Views: The Power Move Most Developers Skip

Michael Patrick McCoy

Master PostgreSQL views and materialized views with practical Pagila examples and learn the power move most developers skip!


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The Truth About PostgreSQL Constraints

Michael Patrick McCoy

Most developers think they understand database constraints — until PostgreSQL politely corrects them. Constraints aren’t just rules. They’re guarantees. They tell PostgreSQL what must be true at all times. And when constraints are designed well, your data stays clean and your application becomes dramatically safer!


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Window Functions in PostgreSQL: The Real Beginner’s Guide

Michael Patrick McCoy

If you’ve ever needed running totals, rankings, or “compare to previous row” logic, window functions are the tool you’ve been missing. This beginner-friendly guide walks through PostgreSQL’s window functions using Pagila so you can start using them with confidence!


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How to Safely Delete Rows in Production Without Causing Chaos

Michael Patrick McCoy

Need to delete rows in production? One wrong DELETE can wreck your app. This article shows the safe, battle-tested steps pros use to avoid outages and regrets.


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How to Generate Sample Data in PostgreSQL (The Easy Way)

Michael Patrick McCoy

A quick, beginner-friendly guide to generating sample data in PostgreSQL. Learn how to create thousands of rows using generate_series, random(), arrays, and timestamps — no CSVs required.


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Isolation Levels in PostgreSQL: A Beginner-Friendly Guide

Michael Patrick McCoy

A simple, practical guide to PostgreSQL’s isolation levels. Learn what READ COMMITTED, REPEATABLE READ, and SERIALIZABLE actually mean — with real examples that finally make everything click!


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