MySQL a PostgeSQL

Petr Cech cech na atrey.karlin.mff.cuni.cz
Čtvrtek Duben 20 17:37:36 CEST 2000


On Thu, Apr 20, 2000 at 01:20:28PM +0200 , Stepan Cirkl wrote:
> dd
> 
> Postgres je siren pod GPL, tedy je absolutne volny. U MySQL si musite v

1) postgresql neni sizen pod GPL, ale spis BSD-like
Copyright.  The following copyright applies to the entire distribution:

  PostgreSQL Data Base Management System (formerly known as Postgres, then
  as Postgres95).

  Copyright (c) 1994-7 Regents of the University of California

  Permission to use, copy, modify, and distribute this software and its
  documentation for any purpose, without fee, and without a written agreement
  is hereby granted, provided that the above copyright notice and this
  paragraph and the following two paragraphs appear in all copies.
[atd]
2) co si predstavujete pod "absolutne volny"

> nekterych (komercnich) situacich koupit licenci.

mysql JE sireno pod GPL - teda starsi verze

> MySQL je jednodusi, rychlejsi, ale nema podporu transakci, vlozenych funkci
> a nekterych dalsich pokrocilych funkci. Postgres se snazi byt plnohodnotne
> SQL, ma transakce.. a je pomalejsi.

pomalejsi jak v cem. pri read-only databazi pro WWW urcite, pro slozitejsi
SELECTy vitezi (taky tim,ze je mysql vubec nezvlada).
				Petr Cech
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           cech na atrey.karlin.mff.cuni.cz

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