Power BI Data Modelling Before DAX

Your report total is right until someone adds a slicer. Then a number doubles, a chart shows a stray blank bar, and the fix is another layer of formula. Most of these problems start in the model, not in the DAX. This book shows you how to design the model first. You will learn to set the grain of every table, split facts from dimensions, reshape a flat extract into a star schema, and choose the ri...