List data from another file

[Capt JB]

Hello,

I gonna need help again for the following. I turned it around several times, but cannot find a correct result.

I have two files, one helicopter database, and one registration database linked by a helicopter ID.

I would like to regroup all registrations having the same helicopter ID in one single repeating field in the database helicopter.

the field storing registration is a text field, the helicopter ID is a calculation (concatenate of three other text fields)

Any help will be very much appreciated, for both the teaching and the solution.

regards

[comment]

I would like to regroup all registrations having the same helicopter ID in one single repeating field in the database helicopter.

Why not use a portal instead?

the helicopter ID is a calculation (concatenate of three other text fields)

That's something you should re-examine, IMHO.