Entry

Database: Relational: Key: Primary: What is: What is a primary key?

Apr 15th, 2007 04:23
Knud van Eeden,

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--- Knud van Eeden --- 10 March 2005 - 07:46 pm ----------------------

Database: Relational: Key: Primary: What is a primary key?

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A primary key is a column (or a set of columns) that uniquely
identifies (the data in) a row within that same table.

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Book: see also:

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[book: author: Greenspan, Jay / Bulger, Brad - title: MySql/PHP 
Database Applications - ISBN: 0-7645-3537-4 - p. 10 '1st normal form']

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[book: author: Hibbs, Curt / Tate, Bruce A. - title: Ruby on Rails: Up 
and Running - publisher: O'Reilly - year: 2006 - ISBN 978-0-59-610132-
9 - 'Relational Database Relationships']

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Internet: see also:

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About: Primary key
http://databases.about.com/cs/administration/g/primarykey.htm

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Wikipedia: Primary key
http://en.wikipedia.org/wiki/Primary_key

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Database: Language: SQL: Overview: Can you give an overview of links 
about SQL?
http://www.faqts.com/knowledge_base/view.phtml/aid/32811/fid/54

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