Στις Wednesday 07 April 2010 11:06:44 ο/η Yeb Havinga έγραψε: > Achilleas Mantzios wrote: > > You could also consider the genealogical approach, e.g. > > > > > > The parents of any node to the root, i.e. the path of any node to the root > > are depicted as > > parents[0] : immediate parent > > parents[1] : immediate parent of the above parent > > > What I have more than one parent?
Then it is no longer neither a tree, nor a hierarchical structure, but rather a graph. This a totally different problem. > > regards, > Yeb Havinga > > -- Achilleas Mantzios -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
