Skip to main content
cancel
Showing results for 
Search instead for 
Did you mean: 

Compete to become Power BI Data Viz World Champion! First round ends August 18th. Get started.

Reply
oneraj4u
Helper I
Helper I

Dataflows: Merge functions store data twice?

I am trying to understand how dataflows in Power BI Service store data.

If I append Table A to Table B to create Table C:
Do dataflows duplicate the data from A & B to create C and  store it twice thereby doubling the size of the data flow?

2 REPLIES 2
TomMartens
Super User
Super User

Hey @oneraj4u ,

 

there is a simple answer: yes!

Regards,

Tom



Did I answer your question? Mark my post as a solution, this will help others!

Proud to be a Super User!
I accept Kudos 😉
Hamburg, Germany

Thank you for your response.
Can you point to the exact documentation that discusses this?
I haven't found it within Microsoft's PBI site.

Helpful resources

Announcements
July 2025 community update carousel

Fabric Community Update - July 2025

Find out what's new and trending in the Fabric community.

July PBI25 Carousel

Power BI Monthly Update - July 2025

Check out the July 2025 Power BI update to learn about new features.