I have following main sheets: RESOURCES, EVENTS and CHILDEVENTS
Event table has an enumlist (REF) field pointing to resources list, once I have created this resources list for that event, I want to create for that some child events with other enumlist field
I would like to assign each resource from event to child events, as example
Just clarity, main challange here is, when I try to take items for Event Child2, it will be possible to choose free items from parent Event1, I mean, in that example, I could select of {3 , 4 } but never {1, 2} because they were reserved on Event Child1
You need to subtract the event child list from your event list for that purpose. i.e.
{1, 2, 3, 4} - SELECT(TableName[Event],[Event] = [_THISROW].[Event])