Devrim,
> Today, one of my teacher asked me a question for a practice... I could not
> solve it :)
>
> Here it comes:
>
> We are given the name of the grandfather in a family. Let's call him A. A
> has n sons, each son has children .
etc.
In a month or so, I will be posting an article on advanced tree structure
(based on Joe Celko's work) in PostgreSQL.
Until then, buy a copy of SQL for Smarties, 2nd ed. by Joe Celko. He has two
chapters on tree structure.
--
-Josh BerkusAglio Database SolutionsSan Francisco