Thanks for the reply.
I understand what you've said but it's not quite what i'm trying to do.
I'm looking to make a website which lists lots of categories with lots of levels of subcategories which can be added/updated/deleted all the time and i want my database, which i'm playing about with in Access before i decide anything properly, to be able to cope with any amount of subcategories without having to create any more tables as there is potential for alot of categories and other other categories below those.
I hope i tried to clear up to you what i'm trying to do.
Thanks again for your help