Calculation between two tables

[Michel89]

Hello everybody,

I'm new to PowerBI and have a question about creating a query / formula that can calculate a value from cells of different tables. 

I have a table called 'Werkzaamheden' and a table called 'Kosten' These are shown below:

Werkzaamheden

Kosten

Now. I want to create a query / formula that calculates, for each row in the Werkzaamheden table, what the multiplied costs are.

This should be done as follows:

Werkzaamheden[Duur] * (Kosten[Prijs] from the row at which Kosten[Functie] is equal to Werkzaamheden[Functie])

Can anybody help me with this? I can't seem to figure it out...

[Anonymous]

As jthomso mentioned, If you create a link between the two Functie columns, you can add a calculated column to the Werkzaamheden table:

KostenWerkzaamheden = Werkzaamheden[Duur] * RELATED(Kosten[Kosten])

That one should work 🙂 

[Michel89]

I've tried adding a column to the table 'Werkzaamheden', but got an error:

Expression.Error: The name RELATED hasn't been recognized.

= Table.AddColumn(#"Type gewijzigd", "KostenWerkzaamheden", each Werkzaamheden[Duur] * RELATED(Kosten[Kosten]))

I don't know what I'm doing wrong? 

[Anonymous]

Are you using PowerBI Desktop? Looks like your adding the column in the wrong place (the query editor instead of in the table). Check out this video about how to add a calculated column to a table:

https://www.youtube.com/watch?v=62mLfiNcqVM

[Michel89]

Yes, I am using the PowerBI Desktop

I've tried this first, but then I got a notification that no single value for Werkzaamheden[Duur] could be selected.

(Sorry, language is set to Dutch in PowerBI)

[Anonymous · Accepted solution]

I think you are trying to create a MEASURE (meetwaarde), you should create a COLUMN (kolom). Add the column to the [Werkzaamheden] table and not the [Kosten] table. I just tried and it worked 🙂

[Michel89]

Thanks so much! It works!

[jthomson]

Shouldn't be much wrong with your formula as it is assuming your two tables are related on the Functie column, you may need to use RELATED to pull through your Prijs value