I've a domain on a webhotel, where I only can make one database. But I want some structure in my database, is it possible to align some tables to one group, and some others to a second group?
If you're not sure how to do that it's not something you should attempt. I would switch hosts and find one that allows more than 1 database, otherwise all the tables are going to be in one database, which will not end up well.
I see, but I've maybe come up with a solution for my problem. To organize my tables, I just call them GroupA_Name
GroupA_Name2
GroupA_Name3
GroupA_Name4, and so on...