OK, yet another newbie starting a thread. I sincerly hope i am not upsetting anyone with this one....

I would like to create "model" database for a small venture i am concidering to under take(concidering is ofcourse the big word here). I would very much like to find some database structures or schemas to see the kind of tables and field people use and the relationships between them. I know that every database is different etc etc. But i think it would just be very usefull to see what others have done before.
I wonder if any of you know of links to some database structures that i will beable to have a look at?