Custom Lookup and Group By
问题 TLDR: Why group by clauses are disabled in lookups when the field using the lookup is not empty? I want to do a custom lookup on a field in a form. The table CTable looks like this: Val Spec ------------ A alpha A beta A gamma B delta C epsilon The look up only concerns the Val column which is defined using an EDT with a basic relationship on it: Val == CTable.Val The lookup obviously gives me a list like this: A A A B C Let's to a group by to get rid of all the duplicated As, I thought!