This article describes the possible rounding differences that can appear in DAX. They are related to the data types and the operation being performed: knowing these details helps you write more robust DAX formulas and avoid errors in comparisons.  Read more

This article introduces the Data Ecosystem, an innovative evolution of the modern data warehouse architecture. By combining data lakes, rivers, glaciers, and seas, it offers enhanced scalability, flexibility, and efficiency for today’s data-driven organizations.  Read more

This article describes how to implement a DAX measure to run faster than what you get from the built-in fusion optimization.  Read more

This article describes how Power BI uses the Group By Columns attribute of a column and how you can leverage it in specific scenarios.  Read more

This article compares two common techniques to filter time periods in DAX: calculation groups and many-to-many relationships.  Read more

In December 2022, DAX was enriched with window functions: INDEX, OFFSET, and WINDOW. This article introduces the syntax and the basic functionalities of these new features.  Read more

This article describes different techniques to debug a DAX measure that returns an incorrect result, with and without external tools.  Read more