This article describes the reasons why an Excel pivot table may be slow when using the Analyze in Excel feature of Power BI.  Read more

This article shows how to use calculation groups to change the active relationship in a model in order to let users choose among multiple dates.  Read more

This article explains the roles of the formula engine and of the storage engine used to execute DAX queries.  Read more

A Tabular model can define a measure as a Key Performance Indicator (KPI), thus providing a visual indicator for status and trend. This article describes in detail the KPI settings needed to get the best result using Power BI and…  Read more

This article shows two techniques based on calculation groups: how to implement dynamic format strings in regular measures, and how to perform weight conversion on the fly.  Read more

This article describes the behavior of the DAX functions that manipulate sets; they are useful to create queries and sometimes also to author measures.  Read more

This article and its companion video describe how to create a service principal account to be used with the Power BI API. The reader must already be familiar with the Power BI API.  Read more

This article explains why in many cases, MAX should be used instead of LASTDATE to search for the last date in a time period using DAX.  Read more

This article describes how to use calculation groups to dynamically replace only a partial expression in a complex DAX calculation.  Read more

This article explains the behavior of LASTNONBLANK, LASTNONBLANKVALUE, and similar DAX functions, also providing patterns for performance optimization.  Read more