Understanding Data Modeling in Power BI: Joins, Relationships, and Schemas Explained

According to Microsoft, data modeling in Power BI refers to the process of connecting data from various sources, defining their relationships with each other and structuring it all for efficient analysis and visualization. You might have read all this and gone, so what? Why data modeling in Power BI? Imagine that you have a massive box full of many random receipts from your purchases. If someone asked you to determine how much you spent on fuel, or say fruits on a certain month, how would you go about it? If you were to manually sift through it all, not only would it be tedious, but also there is a high chance your answer may not be 100 percent accurate. However, if you happened to have a system of organizing those receipts into folders for each week or month, and a way to link it all together, you would probably find a more accurate answer easily. This is all what data modeling in Power BI is, or at least a simplified version of it. You can think of data modeling as the act of connect