I'm sorry, I can't edit my post (won't save). Here are two links which show my structure explained above:

• 1st
• 2nd

In 95% of cases in SQL DBs it's good to introduce an artificial "id" (integer sequence) primary key even if some subset of your fields is unique. It's far better for data handling - as you probably noticed ;).
You have mentioned your "laziness" - I'd say - refactor the data structure, because your problems may only stack up in the future.

Thanks for the tip!

szegad said:

You have mentioned your "laziness" - I'd say - refactor the data structure, because your problems may only stack up in the future.

Yeah, I plan to do that. But I think I need some more learning. As I said, I struggle with creating a useful and logic structur for my purpose