Message-ID: <414EF3E6.9040202@numerixtechnology.de>
Date: Mon, 20 Sep 2004 16:14:46 +0100
From: T E Schmitz <mailreg@numerixtechnology.de>
Reply-To: mailreg@numerixtechnology.de
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To: pgsql-sql <pgsql-sql@postgresql.org>
Subject: COUNT(*) to find records which have a certain number of dependencies
 ?
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Hello,

I apologize in advance for this garbled message but I've been banging my 
head against a brick-wall for a while and I just can't figure how to do 
the following:

I have 3 tables BRAND,MODEL,TYPE which are related to each other:

BRAND
=====
BRAND_PK
BRAND_NAME

MODEL
=====
MODEL_PK
MODEL_NAME
BRAND_FK (NOT NULL, references BRAND_PK)

TYPE
====
TYPE_PK
TYPE_NAME
MODEL_FK (NOT NULL, references MODEL_PK)

------------------------------------

I want to select only those BRAND/MODEL combinations, where the MODEL 
has more than one TYPE, but only where one of those has TYPE_NAME='xyz'.
I am not interested in MODELs with multiple TYPEs where none of them are 
called 'xyz'.


-- 


Regards/Gruß,

Tarlika Elisabeth Schmitz