Data modelling and DAX
Introduction How to choose the correct storage mode for Power BI Tables. This article aims to help explain the different storage modes available when designing an aggregation strategy for a Power BI Report. What each storage mode is and when you would use it. Picking the correct storage mode for each table in your model … Continue reading Power BI Storage Modes for Aggregations
This article introduces the Power BI User-defined Aggregations feature. It includes a walkthrough example (with video) showing how to configure and test a simple model to use this feature. If you have not used Power BI User-defined Aggregations before, need a refresher or reminder, or are just keen to understand how to configure, this article … Continue reading Intro to Power BI Aggregations
One approach to optimise DAX queries is to focus on the number of Storage Engine (SE) calls generated by a query and look for ways to provide the same result using fewer SE calls. If a query takes 30 seconds to run and makes hundreds of SE calls, reducing the number of SE calls almost … Continue reading DAX 1-Column Fusion
My last article described the Shadow Model data modelling technique and how you can use it to help resolve a specific performance challenge caused by tables forced to direct query mode in particular scenarios. The approach detailed in that article used the GROUP BY method of mapping “alternate of” columns which can result in unwanted … Continue reading Mixed Grain aggregations
