Forum Discussion
Do merge operations like Append store data twice?
I am trying to understand how Power BI stores data. If I append Table A to Table B to create Table C: Does Power Query / Power BI duplicate the data from A & B to create C and store it twice the...
Thanks for your response!
Do you have a link to any documentation on the matter per chance?
Hi Anonymous
The own documentation of Microsoft: https://learn.microsoft.com/en-us/power-query/append-queries Also, if you try to remove one of the appended tables it will give you an error. The only solution may be to apply SQL to join them before importing data into Power BI. There are lot of links on how to do it. For instance:
I appreciate your effort, unfortunately I did not see anything about the storing of data in the Microsoft documentation.
I don't have any issues or questions regarding how to Append or the behaviors, just the storage.
Thanks for your time 🙂Just as a follow up - i use XMLA endpoints in SSMS, not SQL.