AI row count estimates arrive with tremendous confidence. Cardinal said four hundred. The query returned nine million.
AI Basics: The Four Circles, and Four More Questions
Part one of ten. Most AI interview questions start here, even for senior roles. Someone asks you to explain a large language model in plain words, and your answer tells them more than your resume does. 1. What is the difference between AI, machine learning, deep learning and generative AI?…
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Erdős Unit Distance Problem: What It Is and What AI Found
The Erdős unit distance problem asks how many pairs of points can sit exactly one unit apart. Paul Erdős guessed the answer in 1946, and the guess stood for eighty years. In May 2026, an OpenAI model found a counterexample. I checked the grid trick behind it in SQL Server, spatial queries included.
AI Generated ETL Worked on Day One. Then Came Monday.
AI generated ETL ran clean on the first try, and it took six weeks to find out what it was missing. A late Monday file, a file sent twice, a file full of zeros and mangled names all got through. The ugly old job had a rule for every one of them, and nobody had written those rules down. Now I ask AI for the failure list before I ask for any code.
100 AI Interview Questions and Answers for Data Professionals
My new book is out. It holds the 100 AI interview questions data interviewers ask now, with answers short enough to say out loud. Six of those questions are in this post, free.
Navier-Stokes Problem: What It Is and What AI Found
The Navier-Stokes problem in plain words: what the famous fluid question asks, what AI says it found, and why it is not official yet.