A short and efficient guide covering the main concepts and commands for SQL.
Feel free to use it as a reference or learning tool.
NOTE: This is still a work in progress and was originally created for personal use — errors or unclear explanations might be present.
⚠️ DISCLAIMER: For this guide, I created a small custom database using non-sensitive data inspired by my own real-estate records.
The dataset was structured for practice purposes only and does not contain any private or proprietary information.