It's a very hard problem to solve. The best you can really manage is to automatically merge non-conflicting changes, and defining what is a conflicting change w

It's a very hard problem to solve. The best you can really manage is to automatically merge non-conflicting changes, and defining what is a conflicting change will require some extra knowledge if you have multiple tables with relations between them. For extra fun try doing this with geographic data and try merging geometry changes correctly.