Is posible to execute a join without creating a join table?[/quote]
Yes... if it is a HAS ONE relationship... u just need to add the field YOURRELATEDMODEL_id in the model table...
Example:
Lets say u have the model Owner and the model Dog and u need to relate those. Instead of creating a join table with: id, owner_id, dog_id, you can simple add the field dog_id in the owner table.
I hope u understood my answer and it is the answer u are looking for.