Get multiple ID columns into one column in a matrix

[vanguard2x2]

Greetings everyone, 

I want to combine multiple (two) columns that have parent/child relationship into one column when drilling down in a matrix. Let me give an example - the matrix looks like this now:

So I want a column name "ID" combined of the other two columns (Program ID and Phase ID) with the following conditions:

- For program it only shows the program ID

- When drilling down to the phases it shows the phase IDs

- and for the manager name it should show a blank value because there is no ID for it

------

So the result should look like this:

The data is comming from two tables: Programs and Phases;

There is a "one-to-many" relationship between the two tables (Program > Phase)

I appreciate any help regarding this issue and thanks in advance! 

[vanguard2x2]

That worked!! Thanks so much!

[johnt75 · Accepted solution]

You could try

Combined ID =
IF (
    ISINSCOPE ( 'Phase'[Name] ),
    SELECTEDVALUE ( 'Phase'[Phase ID] ),
    IF ( ISINSCOPE ( 'Program'[Name] ), SELECTEDVALUE ( 'Program'[Program ID] ) )
)