The previous chapter showed you how to access data from a range of database and data warehouse sources. This process is both simple and efficient, as you saw. However, there is one stage in the process of fetching data that can take a little time, especially if you are dealing with large datasets. This is the “load” phase where the data from the source system is transferred into the Power BI Desktop in-memory model and compressed.
The Power BI development team has clearly looked hard at this question and has come up with ...
