DAX | Calculated columns exercise | Categorise Great British Bake-Off series by viewing figures using SWITCH

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Software ==> DAX  (28 exercises)
Version ==>
Topic ==> Calculated columns  (5 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).

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Open the Power BI desktop file in the above folder to see:

GBBO data

Your task will be to divide the series into viewing figure bands.

In the underlying table, create a new column called Viewing Band which uses the SWITCH function to allocate series to different bands according to these rules:

Million viewers Band
Up to and including 5 Niche
6 to 8 Mainstream
9 to 12 Cult
More than 12 National treasure

The syntax of the SWITCH function is usually:

=SWITCH ( TRUE(), First condition, what if it's true, ... , Last condition, what if it's true, What to do if none of the conditions was true )

Turn the report's table into a matrix and use it to count how many series there were in each band for each channel:

Viewing figures

Channel 4 aren't national treasure level yet ...

Save this file as There was only one Rahul, 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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