creare database gerarchici

se vi venisse in mente di creare un social (come g+ o f+), ci vogliono strutture db performanti....

http://dev.mysql.com/tech-resources/articles/hierarchical-data.html

http://shirky.com/writings/ontology_overrated.html

http://www.artfulsoftware.com/mysqlbook/sampler/mysqled1ch20.html#nodes_edges_paths_model

http://shirky.com/writings/ontology_overrated.html

http://www.alandelevie.com/2008/07/12/recursion-less-storage-of-hierarchical-data-in-a-relational-database/

http://articles.sitepoint.com/article/hierarchical-data-database