PostgreSQL is an Open Source relational database with a long history. Originally developed at Berkeley for academic reasons and named Ingres, in its early life PostgreSQL formed part of the Ingres commercial database system and part of the Illustra database system (later to become part of Informix). PostgreSQL supports transactions, functions, views, foreign keys, language interfaces, and inhertance. PostgreSQL can be obtained from http://www.postgresql.org/.
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PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.