This blog post was brought to you by Diego Oppenheimer a Program Manager on the Excel team. Some weeks ago I introduced an important, new part of the Excel 2013 Data Model and how you could create relationships between different data sources right in your Excel workbook (http://approjects.co.za/?big=b/microsoft-excel/archive/2012/08/23/introduction-to-the-data-model-and-relationships.aspx).