Send us a textAs we seem to mention this on almost every episode, we decided to devote an entire podcast to it - pre-aggregation.To start off with, a matter of terminology.  The official terminology is "aggregation".  In the title we talk about pre-aggregation - this is a matter of clarity since every aggregate function (sum, average etc) carries out an aggregation.  What is officially called aggregation is a technique that aggregates the data in-memory during the loading process and link these aggregations to your measure definitions.The documentation describes the basics of how to build aggregations, but as ever, Reza Rad has a fantastic tutorial on how to do this.You can download Power BI Desktop from here.If you already use Power BI, or are considering it, we strongly recommend you join your local Power BI user group here.To find out more about our services and the help we can offer, contact us at one of the websites below:UK and Europe: https://www.clearlycloudy.co.uk/North America: https://clearlysolutions.net/

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