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From: Bart Degryse <Bart.Degryse@indicator.be>
To: pgsql-sql@postgresql.org
Subject: Re: We all are looped on Internet: request +transport =   invariant
Date: Mon, 23 Apr 2007 08:46:59 +0200
Message-ID: <462C7282.A3DD.0030.0@indicator.be> (raw)
In-Reply-To: <14533649203.20070420172127@narod.ru>
References: <14110647859.20070413105812@narod.ru>
	<20070413150936.GA31517@phl ogiston.dyndns.org>
	<1684192906.20070419090827@narod.ru>
	<20070419134808.GB14 187@phlogiston.dyndns.org>
	<20070419134808.GB14187@phlogiston.dyndns.org>
	<81 4860828.20070420120819@narod.ru>
	<4628BCC8.A3DD.0030.0@indicator.be>
	<14533649203.20070420172127@narod.ru>

A hierarchical is specialized in managing data which is hierarchically
structured, while a relational database is not.
Maybe this analogy is clearer: If you want to fly you could attach
wings to your sportscar, but it's more logical to use a plane.

>>> Dmitry Turin <sql4-en@narod.ru> 2007-04-20 16:21 >>>
>you could use a hierarchical database instead of a relational
database

why ?
why is impossible to make addition for relational database?

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