# PowerPivot | The CALCULATE function exercise | Create measures to sum sales for the Northern powerhouse

This exercise is provided to allow potential course delegates to choose the correct Wise Owl Microsoft training course, and may not be reproduced in whole or in part in any format without the prior written consent of Wise Owl.

 Software ==> PowerPivot  (75 exercises) Version ==> Excel 2016 and later Topic ==> The CALCULATE function  (15 exercises) Level ==> Average difficulty Subject ==> Power BI training
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). Once you've done this:
1. Go into SQL Server Management Studio;
2. Open the SQL file you've just unzipped (you can press CTRL + O to do this); then
3. Execute this script.

This will generate the database that you'll need to use in order to do this exercise (note that the database and script are only to be used for exercises published on this website, and may not be reused or distributed in any form without the prior written permission of Wise Owl).

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Create a new workbook, and import the following tables into a PowerPivot data model:

Give these five tables friendly names, as shown.

Create a measure called Northern Powerhouse in the Purchase table to show total sales in the following regions:

Region Id number
North 4
North-West 5
Yorkshire & Humberside 9

As a reminder, the syntax of the CALCULATE function is this:

=CALCULATE ( Expression, Constraint )

Make your life easier by using a criteria based on the region id, not name.  You'll need to use the two pipe characters (||) for "or".

You should now be able to create the following pivot table, showing one explicit measure and one implicit one:

The first few products in alphabetical order.

Now create another measure called Northern share in the Purchase table, which divides the Northern Powerhouse measure by the total quantity sold to get this:

Sales in ascending order of Northern percentage share.

Save this workbook as Come back George, then close it down.

You can unzip this file to see the answers to this exercise, although please remember this is for your personal use only.