http://www.grzm.com/fornow/ en-us 2004-07-10T00:06:44+09:00 http://www.grzm.com/fornow/archives/2004/07/10/static_hierarchies The nested set model is a convenient way to represent hierarchies in SQL. By taking advantage of the set nature of relations, it provides quick and relatively simple queries to determine, for example, all descendants of a given node. Such... Michael 2004-07-10T00:06:44+09:00