Hi,

Following on above issue, I tested the database connection of my dataclasses. Both return an error on a key mismatch. I followed the exercices putting the right property key in. But both for pa_account and pa_contact, the error suggest these properties have not been set as the table keys. Below the errors:

There is a key mismatch: the keys defined for class Edu-B2B_CRM-Data-pa_contact do not match the primary key columns for external data table public.pa_contact in database CourseDB ; the class keys are [ContactId] , but the table's primary keys are []

There is a key mismatch: the keys defined for class Edu-B2B_CRM-Data-Account do not match the primary key columns for external data table public.pa_account in database CourseDB ; the class keys are [AccountNumber] , but the table's primary keys are []

Sorry for the delay.

Here are a couple of screenshots of the data transform used.

and the pages and classes tab  (this should already be set for you if you use the magnifying class to create the data transform)

let me know if this helps