ALL to Show Categories

[Miron]

I trying a DAX code from book and it seem's it doesnt work:

Categories = ALL ( 'Product'[Category] )

It is basically a code to show the categories, a thing that we can accomplish with dragging a filed to table or matrix but I wanted to test the code anyway and to see how it works.
Power BI app didn't like the code and responded with "Can't display the visual".

 

[Matt Allington]

All returns a table. You can’t write this formula as a measure. You can click on the “new table” button on the Modelling tab and write it there. Then the table will be visible in the data view