From: | "Robert Wimmer" <seppwimmer(at)hotmail(dot)com> |
---|---|
To: | Nabil(at)kramer-smilko(dot)com, rabroersma(at)yahoo(dot)com |
Cc: | lefevre(dot)10(at)osu(dot)edu, pgsql-novice(at)postgresql(dot)org |
Subject: | Re: Mapping one to many |
Date: | 2007-06-13 20:53:16 |
Message-ID: | BAY139-F35B1E8AE60E9584F7AB288D0180@phx.gbl |
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Lists: | pgsql-novice |
>
>I am not saying that this solution doesn't work or even that is a "bad"
>one but what I'm saying is that there is obviously a better solution. Also
>there are better forms, other than row/column, in which to module data but
>there any Databases that support them. If you'll notice from my second
>message I was asking why that is so is so and to please enlighten me to
>the magic of RMDBs. I feel as if there is something about RMDBs that will
>explain alot but is just beyond my reach and I what to know what it is.
>
>
Sometimes it's really good to know, why things are how the are. The base for
RDBMs is pure mathematic.
This would be a first step into it
http://en.wikipedia.org/wiki/Codd
Besides, there is no problem to store tree structures in an SQL System. As
far as i know there even exists an LDAP implementation in DB2. Here is a
description (hard to read for beginners - but it works and is "simple")
Regards Sepp
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