thank you very much for your quick reply. And thank you very much for your help. DAX is still absolutely new to me and I have only been working with Power BI for a few weeks... (I love it)
But I have an error message when i try to create the measure
A function of type โPREVIOUSDAYโ was used in a true/false expression that serves as a table filter expression. This is not permitted.
The original message in German is: Eine Funktion vom Typ 'PREVIOUSDAY' wurde in einem True/False-Ausdruck verwendet, der als Tabellenfilterausdruck dient. Dies ist nicht zulรคssig.
