Data Analytics Notes

Built from real practice to understand how data actually works.

These are my structured notes from learning data analytics using Google Sheets, SQL, Python, and Apps Script — while developing the Belle app.

Built from real practice while developing my own system — read how I approached learning data analytics while building my own app →

Start Here

Learn Python fundamentals before applying automation and data workflows.

Google Sheets (Data & Automation)

Core tools I use daily to clean, structure, and automate data workflows.

  • QUERY function
  • Named ranges
  • Dropdown logic
  • Data workflows
  • Apps Script automation

SQL

Foundations for querying, filtering, and organizing structured data.

  • SELECT
  • WHERE
  • ORDER BY

Python

Building logic, automation, and data handling from scratch.

  • Strings
  • Lists
  • Loops
  • Pivot tables
  • Pinterest pages (30+ documented examples)

Why This Page Exists

I’m building the Belle app myself. This page documents everything I learn — clearly, in one place.

→ Download the Belle App

How to Use This Page

Start with Python basics, then move into Google Sheets and SQL. Each section builds on the previous.

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