Lugano, TI, CHUsing VALUES in SUMMARIZE
Marco Russo & Alberto FerrariThis article describes when to use VALUES in a table grouped by SUMMARIZE, then goes on to explain why you cannot however use VALUES with SUMMARIZECOLUMNS. Read more
Understanding value filter behavior in SUMMARIZECOLUMNS
Value filter behavior is a setting in Power BI semantic models that controls how filters are combined in SUMMARIZECOLUMNS. This article explains how it works and suggests its best configuration. Read more
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Introducing calendar-based time intelligence in DAX
This article introduces the new calendar-based time intelligence functions in DAX, available in preview from the September 2025 release of Power BI. Read more
Introducing user-defined functions in DAX
User-defined functions are a new and exciting feature in DAX. In this article, we outline the key concepts to understand before using them in Power BI projects. Read more
DAX Patterns
Events in progress
The Events in Progress pattern has a broad field of application It is useful whenever dealing with events with a duration - events that have a start date and an end date The event is considered to be in progress… More on DAX Patterns
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Optimizing DAX, Second Edition
Optimizing DAX is the state-of-the-art book on optimizing DAX expressions in Power BI and Analysis Services semantic models.
Learn how to locate performance bottlenecks, read the query plan and performance metrics, rewrite the slower part of an expression, and measure the performance improvements. Read more