Adding rows to a table

Hi VietNor 

You can duplicate the query, rename School to Class and Append the duplicate to the original. This approach will add an extra overhead in the ETL process so this can cause refresh to take longer dependin on the data size.

You can also create a separate dimensions table with a single column for both class and school but since both are not in the same column in the fact table, you must use a disconnected table approach and filter the visual indirectly using measures.

Please see the attached sample pbix.