Re: What is a tuple?
От
Timothy Reaves
Тема
Re: What is a tuple?
Дата
Msg-id
20020625224811.6854a2bb.treaves@silverfields.com
Ответ на
What is a tuple? (Elaine Lindelef)
Список
Дерево обсуждения
What is a tuple? Elaine Lindelef <eel@cognitivity.com>
Re: What is a tuple? Timothy Reaves <treaves@silverfields.com>
Re: What is a tuple? Rich Shepard <rshepard@appl-ecosys.com>
Re: What is a tuple? Martijn van Oosterhout <kleptog@svana.org>
Re: What is a tuple? Bruce Momjian <pgman@candle.pha.pa.us>
Re: What is a tuple? Elaine Lindelef <eel@cognitivity.com>
Re: What is a tuple? Bruce Momjian <pgman@candle.pha.pa.us>
Re: What is a tuple? ktt <kestutis98@yahoo.com>
Re: What is a tuple? Curt Sampson <cjs@cynic.net>
Re: What is a tuple? "David Siebert" <dsiebert@eclipsecat.com>
Re: What is a tuple? Martijn van Oosterhout <kleptog@svana.org>
Re: What is a tuple? Chris Humphries <chumphries@devis.com>
Re: What is a tuple? Josh Jore <josh@lavendergreens.org>
On Tue, 25 Jun 2002 14:40:03 -0700 Elaine Lindelef wrote: > My apologies for the stupid question, but before I started using > postgres I never came across the word "tuple" quite in this context > before. I know a "tuple" as "a data object containing two or more > components" ... but I'm not sure of its precise meaning in the > postgres universe. Is a tuple a row, a field value, a field value > paired with its datatype, what? If someone asks me the size of my > largest tuple, how do I calculate it? It seems to be related deeply > to the structure of postgres somehow. > 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.
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