Related selection from a DB

Hi.
I’ve a question about DB.

  1. I’ve created a DB (“db_test_001”) with 3 columns: " bore ", " class " and " boreclass ".
  2. I’ve connected dropdown3 to bore_DB_values.
  3. When I select a bore value from dropdown3, the value is inserted #input7.
    Quetsion:
  4. How to insert into #input8 the class value related to selected bore ?
    In this example, bore = 1"x3/4", and calss = 150_c

Thanks a lot
Pezz