All Articles & Tutorials
Explore practical guides, step-by-step masterclasses, and foundational definitions across AI, SQL, and data systems — written in plain, human English.
All articles
How to clean data in Google Sheets before you analyze it
A practical Sheets cleaning pass: trim, dates, splits, nulls, and deduping only after grain is clear. Keep raw copies; log your steps.
What Grok is good at, where it falls short, and why it acts the way it does
Understand the true capabilities and limitations of Grok. We break down the differences between Fun Mode and Regular Mode, explore how it ingests live X data, and map…
How to use the ChatGPT desktop app for chat, office work, and coding
Part 4 of Learn ChatGPT from scratch. How the desktop app puts Chat, Work, and Codex in one place, what Free still limits, and how to pick a…
When to use a Claude chat, a Project, or Research
Part 4 of Learn Claude from scratch. When bare chat is enough, when a Project earns its keep, how files and Research fit, and a starter Project kit…
Keys, IDs, and joining in plain English
Why customer_id beats matching on names. Primary keys, foreign keys, one-to-many joins, and sheet habits that keep IDs stable.
