Yes, All the input views of an intersect view must have the same number of fields and name for it to associate their fields. The wizard automatically associates the fields with the same name, but you have to associate the rest. It is mandatory to add associations between all the fields of the input views.
You can refer to [Creating Intersection Views](https://community.denodo.com/docs/html/browse/8.0/en/vdp/administration/creating_derived_views/creating_intersection_views/creating_intersection_views) for more information.
Hope this helps!