When I create a CSV file, all the data is in one column. How can I display the data in an Excel spreadsheet?

The CSV is just the raw version of the data and is comma separated. Die Daten werden aus der Datenbank als CSV-Datei exportiert. 

Here are a few instructions on how to open the CSV file with Excel, LibreOffice or OpenOffice:

 https://www.giga.de/tipp/csv-dateien-richtig-in-excel-co.-oeffnen-so-gehts/