Universe mapping in data foundation

Hi All,

I'm using existing universe .UNV for enhancement project.

My Query is as follows :-

During universe mapping,I was imported few more tables in to existing universe and joined with relation.

and I was completed universe mapping with few tables left with out join.

Now If I write a query do I face data related issues as I left few tables with out join?

Please give your reply in a detail manner.

Thanks

Ram