When Values Disappear in Power BI

Chris Webb explains what happens when a selected value on a slicer disappears in the underlying data set in Power BI:

There is a slicer on the left with five items in it, a table showing the actual contents of the table (I’ve disabled visual interactions so the slicer doesn’t slice the table) with five rows and a card showing the output of the following measure:

Selected Number = SELECTEDVALUE(MyNumbers[Column1], "Nothing Selected")

In the screenshot above you can see I have selected the value 78 in the slicer and the measure – as you would expect – displays that value.

Now what happens when you refresh the dataset and the table contains a different set of numbers? 

Read on for the full explanation.

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