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Using Variables for Clean and Efficient DAX Alan Lewis Thu, 02/05/2026 - 09:14

Introduction 

Variables are one of the most transformative features in DAX. They revolutionized how we write formulas, making complex calculations readable, maintainable, and significantly faster. 

Before variables, DAX formulas often became tangled webs of nested functions that were difficult to understand and debug. Today, variables allow us to break down complex logic into named, meaningful components that tell a clear story. 

Mastering CALCULATE in DAX: A Deep Dive into Filter Context, ALL, ALLEXCEPT, REMOVEFILTERS, and KEEPFILTERS

CALCULATE is the most important function in DAX.

If you truly understand CALCULATE, you understand how Power BI thinks.

It allows you to control filters, override slicers, ignore visuals, and apply business rules correctly. Almost every advanced Power BI measure relies on CALCULATE in one way or another.

In this article, we will explore CALCULATE in depth and clearly explain how filter modification works using:

• ALL

• ALLEXCEPT

• REMOVEFILTERS

• KEEPFILTERS

Feb 05, 2026
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