you have a data set with product, date, customer, and sales information. The IT department forgot to put sector in there. Here is a lookup table that maps customer to sector. Time for a VLOOKUP, right? There is no need to do VLOOKUPs to join these data sets if you have Excel 2013 or newer. These versions of Excel have incorporated the Power Pivot engine into the core Excel. (You could also do this by using the Power Pivot add-in for Excel 2010, but there are a few extra steps.) In both the original data set and the lookup table, use Home, Format as Table. On the Table Tools tab, rename the table from Table1 to something meaningful. I’ve used Data and Sectors. Select one cell in the data table. Choose Insert, Pivot Table. Starting in Excel 2013, there is an extra box, Add This Data to the Data Model, that you should select before clicking OK. The Pivot Table Fields list appears, with the fields from the Data table. Choose Revenue. Because you are using the Data Model, a new line a...
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