Why a short list
The Power BI internet is enormous and uneven: excellent material sits next to outdated advice that was right in 2018. A short list you trust beats a long list you have to evaluate every time. Everything below earned its place by being accurate, maintained and specific.
Tier 1: authoritative
The source of truth for what a feature does, its limits and its licensing.
| Source | Use it for |
|---|---|
| Power BI documentation | Features, settings, limits, licensing |
| Power BI guidance | How Microsoft recommends you model, secure, size and govern |
| Microsoft Fabric documentation | OneLake, Lakehouse, Warehouse, Direct Lake, capacities |
| Microsoft Learn training | Free structured modules and the official exam study guides |
| Power BI blog | Monthly feature summaries: what changed this month |
Tier 2: specialist
Deep, opinionated, technically rigorous. When docs say what, these explain why and how well.
| Source | Use it for |
|---|---|
| SQLBI and DAX Guide | DAX semantics, modeling and performance; the reference for how the engine really behaves |
| DAX Patterns | Ready-made business patterns (time intelligence, ABC, budget, new customers…) |
| DAX Studio docs | Server Timings, query plans, VertiPaq Analyzer |
| Tabular Editor docs | Model scripting, Best Practice Analyzer, TMDL workflows |
Tier 3: community
Where you ask when you're stuck, and find the person who hit your exact error last year.
| Source | Use it for |
|---|---|
| Microsoft Fabric Community | Forums for Desktop, Power Query, Service, Report Server and developer questions; ideas and known issues |
| Local and virtual user groups | Real-world practice, people to learn from, your next job |
Tip: Before posting a question, reproduce it on a tiny dataset (the course datasets are ideal), include the exact error and what you tried. You'll often solve it while writing the question.
How to judge anything else
When you find a new article, video or course, ask:
- When was it written, and for which version? Anything about Direct Lake, Copilot, PBIP, deployment or licensing older than a year needs checking.
- Does it say why, or only what? Advice without reasoning can't be adapted to your case.
- Does it agree with Tier 1 on facts? On opinions, specialists can (and do) disagree with Microsoft; on limits and features, the docs win.
- Is it selling something? Fine, but weigh it.