Difference between two columns of a table

[Gianluigi]

Hello,I would like to make the difference between two columns of a table. The two columns refer to two fields in two different tables. Making a simple difference between the two fields of the two tables does not work. Thank you

[amitchandak]

@Gianluigi , you can do it  like

Sum(Table1[Value])  - Sum(Table2[Value])

and view it across common dimensions

Power BI- DAX: When I asked you to create common tables: https://youtu.be/a2CrqCA9geM
https://medium.com/@amitchandak/power-bi-when-i-asked-you-to-create-common-tables-a-quick-dax-soluti...

[Gianluigi]

hello, do you intend to create a new column = Sum(Table1[Value])  - Sum(Table2[Value]) ?