This article shows an optimized DAX technique to display the first N products for each category in Power BI, adding a row that aggregates the value for all the other products. The companion video introduces the scenario and the general…  Read more

Power BI sets a new milestone in Business Intelligence: Marco describes the importance of new composite models in an article, and Alberto shows them in action in a video.  Read more

This article shows how to use the USERELATIONSHIP function in DAX to change the active relationship in a CALCULATE function.  Read more

This article describes the types of relationships available in Power BI and Analysis Services, clarifying the differences in cardinality and filter propagation of physical relationships.  Read more

This article describes what weak relationships are and the differences between strong and weak relationship in Power BI and DAX.  Read more

Activating bidirectional cross-filter in a Tabular data model might create ambiguous paths in the chain of relationships, resulting in very dangerous models as numbers become unpredictable. This article provides a deep explanation of the kind of ambiguity that might appear…  Read more

The Detail Rows Expression in a Tabular model provides the user with control over the drillthrough results obtained by showing details of a measure. This article describes typical DAX expressions you can use in this property.  Read more

This article introduces a technique to filter and productively compare two time periods with Power BI.  Read more

This article explains how DAX handles dependencies between tables, columns and relationships, to help you avoid circular dependency errors.  Read more

This article describes a number of techniques available to filter tables in DAX, showing possible pitfalls that you can avoid once you know them, in particular using bidirectional filters. One of the hardest things to do, when learning DAX, is…  Read more