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
What is a semantic layer? One place to define your business metrics
A semantic layer defines metrics and terms once for many BI tools. It is not a second warehouse. Start with one certified revenue metric before you buy a…
Building a portfolio that gets interviews
Build a small portfolio around clear questions, real method, and a decision-ready takeaway. Fewer strong projects beat many stock dashboards with no problem statement.
What is dbt? How it turns raw warehouse data into clean tables
dbt turns SQL transforms into versioned models with tests and docs. Learn staging, intermediate, and marts so you can read a change even if you do not own…
Which AI tool to use for your files and office work: ChatGPT, Claude, Gemini, or Copilot
Put AI on files and office work with a work account, a safe first task, and a human Send. Summaries help; unsupervised approvals do not.
How to get started with Google Gemini in your first 30 minutes
Spend thirty minutes in Gemini app or web on one surface. Use constrained prompts, try one file or image if allowed, and leave with one reusable pattern.
