Data Blending in Tableau: How it Works and When You Need it 

Thanks Anil! Which part of the video are you referring to? I assume I just meant that the number of rows would remain the same and wouldn't be impacted by combining elements from multiple tables of data.

Thank you, we're glad you found it helpful!

I don't know if that's very feasible. If you need to define the shared field, you can do that through the Data dropdown on the toolbar in Tableau and then selecting "Edit Blend Relationships". Otherwise you'd need to do something tricky like create a placeholder calculation with matching text and try to blend on that. That could have so very unintended duplication effects however.