DAX | Calculated columns exercise | Count how many rows there are, using RELATEDTABLE

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 ==> DAX  (28 exercises)
Version ==>
Topic ==> Calculated columns  (5 exercises)
Level ==> Harder than average
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).

You need a minimum screen resolution of about 700 pixels width to see our exercises. This is because they contain diagrams and tables which would not be viewable easily on a mobile phone or small laptop. Please use a larger tablet, notebook or desktop computer, or change your screen resolution settings.

Open the Power BI file in the above folder, and go to the quadrant table:

Table of quadrants

This table contains the four quadrants of England!


The aim of this exercise is to add 3 new columns to this table, so that you can show this visual:

Three new columns

The aim is to show for each quadrant how many regions it contains, how many towns it contains and what the ratio between the two figures is.

Start by adding two new calculated columns to this table:

Column What it should contain
Number of regions The number of regions in the related regions table.
Number of towns The number of towns in the related towns table.

Use the COUNTROWS function to count how many rows there are in each related table.

Now create a third calculated column which tells you how many towns there are in each region, and use this to show a table of the quadrants in town density order:

Towns by region

Unsurprisingly, the South has the most towns in it (at least in this database).


Save this as Go East young woman, 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.
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