From: | Rich Shepard <rshepard(at)appl-ecosys(dot)com> |
---|---|
To: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: What is a tuple? |
Date: | 2002-06-26 03:11:51 |
Message-ID: | Pine.LNX.4.44.0206252007050.2847-100000@appl-ecosys.com |
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Lists: | pgsql-general |
On Tue, 25 Jun 2002, Timothy Reaves wrote:
> A 'tuple' is not a database - nor PostgreSQL - term. It is a
> mathimatical term meaing a set. Withen the context of databases, a tuple
> is always a row. 'Tuples' refers to the tuple set, or row set.
And, in the same mathematical language of relational databases, what we
commonly call a "table" is a "relation". "Columns" are called "attributes".
A good database management book will teach you the vocabulary.
Rich
Dr. Richard B. Shepard, President
Applied Ecosystem Services, Inc. (TM)
2404 SW 22nd Street | Troutdale, OR 97060-1247 | U.S.A.
+ 1 503-667-4517 (voice) | + 1 503-667-8863 (fax) | rshepard(at)appl-ecosys(dot)com
http://www.appl-ecosys.com
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