> Here's one explanation... search for others: > http://threebit.net/tutorials/nestedset/tutorial1.html#t Here's the example I was looking for... it took me a while to find it: http://searchdatabase.techtarget.com/tip/1,289483,sid13_gci537290,00.html It's good reading for anyone working with databases to give you a look at alternate methods of designing your tables... ---John Holmes... -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php