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From: Ries van Twisk <ries@jongert.nl>
To: pgsql-sql@postgresql.org
Subject: [OT] Inventory systems    (private)
Date: Tue, 3 Dec 2002 14:17:15 +0100
Message-ID: <000401c29ace$4c9d4170$f100000a@IT001> (raw)

Hi All,

is there any whitepaper, document or website that can point me to how to
setup a inventory system?
I'm particulary interested how other people solve the problem of a unknown
number of attributes to a inventory item.

example:
BAL                <-- Inventory Item
	- Color      <- Attribute
	- Diameter   <- Attribute
	- Weight     <- Attribute

Car                <-- Inventory Item
	- Speed      <- Attribute
	- Size       <- Attribute
	- Weight     <- Attribute
	- Color      <- Attribute

Computer                <-- Inventory Item
	- Brand           <- Attribute
	- Weight          <- Attribute
	- Windows/Linux   <- Attribute


I can ofcource add any number of columns to a table but for a lot of items
there will be a lot of NULL values and currently I don't know how many
attrubutes one item can have (possible between 10 and 20). This can even
change in feature opon request.

Ries




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