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Re: AW: Datenbankstruktur: msg#00046gis.opengeodb
On Tuesday, December 16, 2003 2:33 PM Marco Schmidt <marcoschmidt-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@xxxxxxxxxxxxxxxx> wrote: > On Tue, 16 Dec 2003 14:22:57 +0100, you wrote: > >>> Nur zur Klarstellung: Nested Sets sind keine Frage der >>> Programmiersprache. >> Es ist ein Datenbankmodell, das mittels ganz simpler Sortierung und >> Self-Joins auskommt (das beherrschen alle SQL-Dialekte). < >> >> Ist dann wohl eine Sache des DB-Treibers. Ich finde allerdings keine >> nested Datasets beim MS SQl Server - vielleicht sitze ich aber auch >> auf der Leitung. > > Es ist mehr eine Art "Design-Pattern" als ein Feature. Siehe > <http://123.koehntopp.de/kris/artikel/sql-self-references/. Design-Pattern trifft es besser als Feature. Weitere hoffentlich erhellende Links unter: http://klempert.de/php/nested_sets/literatur/ Viele Grüße Arne -- http://klempert.de :: http://phpbar.de :: http://opengeodb.de
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