DAX | Calendars and dates exercise | Use the USERELATIONSHIP function to join a table twice

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Software ==> DAX  (28 exercises)
Version ==>
Topic ==> Calendars and dates  (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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Create a new Power BI Desktop file, and load both worksheets from the Excel workbook in the above folder:

Two worksheets

One worksheet contains a list of staff with birth and joining dates; the other a list of dates.

 

Make your calendar table a date table (it's always good practice!), and create two relationships:

Calendar relationship

One of the relationships joins the date key to the date someone was born; the other joins the date key to the date someone joined.

 

Create two measures:

Measure What it should do
Number of joiners Use the relationship to the DateJoined field to count how many staff members joined in a given time period.
Number born Use the relationship to the DateBorn field to count how many staff members were born in a given time period.

Here's the syntax of the USERELATIONHIP function as an aide-memoire:

USERELATIONSHIP function

You need to specify the two columns at either end of your relationship.

Create a table showing the value of each measure for each year: 

Date born and joined

A small part of the table, which you can get to by scrolling down.

 

Save this as Staff history, 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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