Data modelling and DAX
This article aims to show how you can speed up distinct count calculations in Power BI using the built-in user-defined aggregations feature. The user-defined aggregation feature in Power BI is designed to work with direct query models and usually gets used for calculations such as SUM, MIN, MAX etc. However, it can also work well … Continue reading Speed up Distinct Count calculations in Power BI using Aggregations
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
Introduction: Around 2014, an enhancement was made to the DAX engine designed to help improve query speed. The enhancement, called DAX Fusion, looks to reduce the number of storage engine scans needed to satisfy queries, by combining similar scans where possible. This optimisation feature exists in Power BI, so can be used to help speed … Continue reading DAX Fusion
This is not so much a DAX tip, rather something you might consider if you want to speed up the performance of any Direct Query (DQ) model you manage in Power BI or Analysis Services. The simple tip is to set relationships to use INNER JOIN rather than LEFT OUTER JOIN in the model. Once … Continue reading Tip to speed up Direct Query
