Overview

Power BI makes it easy to build simple reports, but as you become more proficient, you eventually reach a point where the visuals aren’t the problem - the calculations are. You know what you want to analyse: rolling averages that behave properly, year‑on‑year comparisons that don’t break when slicers change, measures that respond consistently across visuals, and models that don’t rely on fragile workarounds. But getting DAX to do exactly what you intend can feel unpredictable. A small change produces a big surprise. Two formulas that look similar behave very differently. CALCULATE works - until it doesn’t.

Unlike Excel calculations, we don’t have the same visibility and it’s not enough to understand a few key functions, we need to understand how DAX actually evaluates expressions: how tables flow through a calculation, how filter context is created and modified, and how iterators and context transition change the result in ways that aren’t always obvious. Improving your DAX fluency changes what’s possible in your reports. It lets you:

• Express complex business logic cleanly, instead of layering fixes on top of fixes
• Solve reporting problems in the model, rather than in visuals
• Build robust efficient measures you can trust, reuse, and explain to others
• Diagnose why a calculation is wrong, instead of trial‑and‑error guessing

This course is intended for people who already create Power BI reports and are ready to deepen their understanding of DAX so they can tackle more complex analytical requirements with confidence. If you’ve ever felt that your reports are being held back by what you can reliably express in DAX, this course is for you.

Key Learning Outcomes

By the end of this course, participants will be able to:

• Use DAX operators and a wide range of date, text, and logical functions
• Write clearer, more maintainable DAX using comments and variables to break down complex logic
• Create and troubleshoot measures by developing a strong understanding of filter context
• Understand how the Power BI calculation engine and storage engine work together
• Apply iterator functions to perform calculations that require row‑by‑row evaluation
• Use table functions to shape, filter, and pass tables into more advanced measures
• Understand how CALCULATE evaluates expressions, including context transition
• Use appropriate CALCULATE modifier functions to control and override filters
• Build reliable time intelligence calculations that behave correctly across report interactions
• Apply hierarchy functions to implement dynamic row‑level security
• Debug and refine calculations using tools such as DAX Studio and Performance Analyser

Why Attend

• Gain confidence working with DAX beyond basic formulas
• Move from trial-and-error to a structured approach to building calculations
• Better understand how Power BI actually processes and evaluates data
• Build models that are more efficient, scalable and easier to maintain
• Improve your ability to troubleshoot and validate complex calculations
• Strengthen your analytical capability for more advanced and flexible reporting