Sum of to many on different tables

[jurgenvd]

hello all

I thought it would be a simple calculation but apparantly it's not and i'm breaking my head .

Table 1: 

i have the data  Availability in month in percentage 

this data is an monthly extract so this aren't unique values,

Table 2:

I have percentage  during planned Maintenance,

here on this table its possible that we have multiple data per month (multiple planned maintenances)

i would like to create a measure

=Table1[Availability %]+Table2[Percentage planned Maintenance]

this however is not possible as i have no unique values in both tables i believe, so i will have to write a bigger DAX formule, but here is where i get lost.

Thanks for your help

[rajendran]

From your message, i understand that the relationship is not set up yet.

As you know, Power BI doesnt support Many to Many relationship, which means both common columns has duplicate values in both tables, you cant directly join them . You need to create a relationship table/ bridge table to make relationship.

Create a table with Unique values from your joining columns and join both of your tables to this new table and set the relationship.

Now try your calculation.

Thanks

Raj

[jurgenvd]

well there is a relationship already towards another table with Unique values

both tables refer to the same table and same field

[rajendran]

"this however is not possible as i have no unique values in both tables i believe" -- i came to that conclusion based on this statement. Do you think you can post some sample data and details about your relationship.

Thanks

Raj

[jurgenvd · Accepted solution]

Thanks for the answer,

I found my solution elsewhere

here is what it fixed 

Create measure for individual %

 tot %= sum(%per month)

tot planned %= sum(planned maintenance per month).

After that create final measure 

[ tot %]  + [tot planned %]