22-25 April 2026

Understanding DAX Through Pictures - Part 2

Proposed session for SQLBits 2026

TL; DR

See DAX like never before. Learn how evaluation context works through clear visuals and practical examples. Perfect for anyone who wants to understand DAX without the confusion.

Session Details

DAX can feel like a black box where things either work or fail without explanation. In this extended session, we’ll break that mystery wide open using visuals that make sense. You’ll see how evaluation context really works and why it matters for every calculation. We’ll explore row context, filter context, and measure design in a way that clicks for visual learners. If you’ve struggled to understand why DAX behaves the way it does, this session will give you clarity and confidence to build better models and measures.

3 things you'll get out of this session

A clear understanding of evaluation context and how it drives DAX calculations. Visual models that make row context, filter context, and measure design easy to grasp. Practical techniques to build accurate, efficient measures with confidence.

Speakers

James McGillivray

jimbabwe.co.za

James McGillivray's previous sessions

The Fundamentals of DAX Contexts
Explore the heart of DAX with this unique session, as I take you on an African Safari-themed adventure, where stunning wildlife photography serves as the backdrop for understanding the intricacies of DAX contexts. We'll encounter row and filter contexts, just like wild creatures in their natural habitat. Through captivating visuals, you'll uncover how these contexts shape DAX calculations and measure outcomes. Whether you're a data analyst or a business intelligence enthusiast, this session ensures a memorable and educational experience. Understanding DAX Contexts is your gateway to mastering DAX while enjoying the captivating beauty of African wildlife. Don't miss this opportunity to embark on your DAX adventure.
 
Fabric Power Hour
The famous Power BI Power Hour returns, but this time it has expanded to cover the whole of Fabric!
 
5 Things You Can Do to build better looking reports
Power BI Design is a lot like an art form, a mythical beast to many IT professionals. We’re generally inclined to think very analytically about our jobs, and creativity does not always come naturally. Thankfully, there are some patterns we can apply to design reports which are clean, uncluttered, and user friendly. Learn the science behind design, and a series of logical steps to follow to ensure that your reports always meet the mark.
 
The Fundamentals of DAX Contexts
Understanding how DAX determines evaluation context is a critical skill for a Power BI Developer. Writing anything other than the most simple measures requires this skill. In this session we'll explore Filter Context and Row Context individually, and how they combine to form Evaluation Context. We'll have a look at a number of simple measures and visualise how the context affects them.
 
"Whats in a Name?", Data Stories to Impress the Bard
Data on its own is useful, but boring. Data in story form makes people sit up and take notice. Learn to craft effective stories and maximise the impact of your data communication.
 
Power BI Report Design for the Aesthetically Challenged
Have you ever looked at other people's Power BI reports, and wondered how they look so good? Designing an aesthetically pleasing report does not require a graphic designer, just the lessons you'll take away from this session.