Concatenate values having id equal to other databasejoin element

[enrb]

Good morning,

I have a form with a databasejoin element that stores the id of the choice as a value.

Is it possible to have under a calc element that returns me as a result the concatenated value of other elements having id equal to the databasejoin element chosen just above?

 

[troester]

That's how a databasejoin is working: storing the value.
You can use the id ({your-dbjoin_raw}) in a calc and run a query.
But why don't you use the databasejoin's "Or concat label" to show concatenated columns?