So lets say you've got a database of users and groups. You want to have what groups the user is in and they are not exclusive to just one group. If you have a group ID in both tables, then you could join them, however, if the person is in multiple groups, then if I separate the group IDs by a comma, then it would be a varchar instead of an int, then I would probably have to splice the whole thing. Would that be how you do it? Or is there a better way?