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Non-Brand Data newsletter by Cornellius Yudha Wijaya: latest issues, cadence and price

by Cornellius Yudha Wijaya · Substack · Free · 2 a week · last issue Nov 1, 2026 · Active

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Non-Brand Data helps data professionals build practical judgment in ML, GenAI, and analytics through structured essays, field guides, templates, and applied workflows.

Sun Nov 13 issues

Lesson 2. Making AI Requests from Google Colab

Lesson 1. Getting Started with AI-assisted Data Analysis

AI-assisted Data Analysis Course

Fri Oct 301 issue

Build Your Own Practice Dataset in Python with Faker

Fri Oct 231 issue

What Makes a Good Data Science Portfolio in the Age of AI?

Sat Oct 171 issue

Data engineering

Building an Interactive Data Analysis Notebook With marimo and DuckDB

Fri Oct 161 issue

Tech business and strategy

Building a Multi-Asset Market Monitor with TickerLayer

Wed Oct 141 issue

Getting Started With TimesFM-3 for Time-Series Forecasting

Sun Oct 111 issue

Can TabPFN-3.5 Compete With Traditional Machine Learning Models?

Sun Oct 42 issues

Module 14: Writing the results and recommendations

Data engineering

Module 13: When a SQL query needs optimization

Fri Oct 24 issues

Module 11: Using window functions without changing the row count

Module 12: Checking whether your result is right

Module 10: Breaking a query into steps with subqueries and CTEs

Software engineering

Context Engineering for Data Science

Thu Oct 11 issue

Module 9: When a join increases your numbers

Wed Sep 301 issue

Module 8: Choosing between INNER JOIN and LEFT JOIN

Tue Sep 291 issue

Module 7: How to define a metric clearly

Sun Sep 271 issue

What Is Jev AI and How Can We Use It for Data Science?

Sat Sep 261 issue

Module 6: WHERE and HAVING: filtering before and after GROUP BY

Sun Sep 203 issues

Module 3: Filtering data with WHERE and NULL values

Module 5: Counting the right thing with GROUP BY

Module 4: Finding the top results with ORDER BY and LIMIT

Thu Sep 171 issue

I Have Worked in Data Science for Almost a Decade. These Skills Aged Better Than I Expected

Wed Sep 161 issue

Module 2: SELECT and FROM: reading the table

40 issues on file since May 14, 2026; every one is in its own archive ↗.

About this newsletter

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Cornellius Yudha Wijaya: Author photo, from Non-Brand Data

Free or paid

Free on Substack. From its subscribe page.

Issues per week, last 26 weeks

2 a week, measured over the last six months (or since the feed's oldest issue)

Issues by month

Writes about

AI and agents (28), Data engineering (5), Software engineering (4) in the last six months.

More on ai and agents

History

Cadence

Now publishes twice a week, was weekly.

Oct 16Source ↗

Cadence

Now publishes weekly, was twice a week.

Oct 8Source ↗

Cadence

Now publishes twice a week, was weekly.

Oct 4Source ↗