Power BI | Creating measures in DAX exercise | Use two variables and the CALCULATE function to create a ratio

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.

The answer to the exercise will be included and explained if you attend the relevant Wise Owl course (sadly, only in the UK for now).

Software ==> Power BI  (88 exercises)
Version ==> Latest update
Topic ==> Creating measures in DAX  (1 exercise)
Level ==> Average difficulty
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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If you haven't already done so, run the SQL script in the above folder to generate the Make-a-Mammal database.

Create a new Power BI Desktop file, and load the tables from this database into your model.  Using variables, create a measure which allows you to show this matrix:

By year and legs

The matrix shows for each cell the ratio between sales for that cell and sales for four- and six-legged animals for the same filter context.

Here's a suggestion of variables to create within your measure:

Variable What it could equal
FourLeggedSales The total quantity of sales for the current filter context, but for animals with 4 legs
SixLeggedSales The total quantity of sales for the current filter context, but for animals with 6 legs
ManyLeggedRatio A/B, where A = the total quantity of sales for the current filter context, and B = the sum of the previous two variables

Save this workbook as Variable fun, then close down the Power BI instance you're using.

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