# Exercise: Use FILTER to show total quantity for quadrupeds separately

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 Category ==> PowerPivot 2010  (26 exercises) Topic ==> FILTER and CALCULATE  (8 exercises) Level ==> Relatively easy Course ==> PowerPivot / Excel Power BI
Before you can do this exercise, you'll need to download and unzip this file (if you have any problems doing this, click here for help).

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To start, if you haven't already done so run the script in the above folder to generate the MAM database (not for commercial use or copying).

Create the following data model:

You'll need to import (deep breath) the Animal, Centre, Pos, Product, Quadrant, Region, Species, Store, Town and Transaction tables.

Use this to create the following basic pivot table:

This pivot tables shows total quantities sold by quadrant and species.

Add a measure which (you think) should give the total quantity sold for four-legged animals only:

=SUMX(FILTER(Animal,Animal[Legs]=4),'Transaction'[Quantity])

You should find this gives an error:

The start of the error message.

The problem is that you can't filter by one dimension but sum a column in another.  To get round this, use the RELATED function to include the number of legs each animal has within the transactions table:

This is what your new column should look like.