In the previous four chapters you saw some of the ways in which you can find and load data into the Power BI Desktop data model. Inevitably, this is the first part of any process that you follow to extract, transform, and load data. Yet it is quite definitely only a first step. Once the data is in Power BI Desktop, you need to know how to adapt it to suit your requirements in a multitude of ways. This is because not all data is ready to be used immediately. Quite often, you have to do some initial work on the data to make it more easily useable in Power BI Desktop. Tweaking source ...