Creating the Data Model
Now that you know how to get data into the Power Pivot model, the next step is to understand what makes a good model. This is very important when dealing with data in Power Pivot. A good model will make Power Pivot perform amazingly fast and allow you to analyze the data in new and interesting ways. A bad model will cause Power Pivot to perform very slowly and at worst give misleading results when performing the data analysis. Traditional Excel pivot tables are based on a single table contained in an Excel sheet. Power Pivot pivot tables are based off of multiple tables contained in the data model. This chapter guides you through the process of creating a solid model that will become the foundation for your data analysis. In addition, you will look at how to present a user-friendly model to client tools. This includes renaming tables and fields, presenting appropriate data types, and hiding extraneous fields.