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Information Technology
Information Technology has to do with the study of and the complete process involved in the development and use of information systems. This includes the design stage, the development, implementation, support and management of information systems. These include both the software application and the hardware components.
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Definition: The primary key of a relational table uniquely identifies each record in the table. It can either be a normal attribute that is guaranteed to be ...
http://databases.about.com/cs/administration/g/primarykey.htm
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Listing added: Apr 8, 2008)
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http://searchoracle.techtarget.com/ateQuestionNResponse/0,289625,sid41_cid451070_tax301455,00.html
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A primary key, also called a primary keyword, is a key in a relational database that is unique for each record. It is a unique identifier, such as a driver ...
http://searchsqlserver.techtarget.com/sDefinition/0,,sid87_gci902812,00.html
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A primary key is used to uniquely identify each row in a table. It can either be part of the actual record itself , or it can be an artificial field (one ...
http://www.1keydata.com/sql/sql-primary-key.html
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Which makes for a better primary key: natural data points or meaningless values? Database developers have strong opinions on this facet of primary key ...
http://articles.techrepublic.com.com/5100-22-1045050.html
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We all know there are very few scenarios where a table in your database should not have a primary key. Such a key is an essential tool for normalization of ...
http://databases.aspfaq.com/database/what-should-i-choose-for-my-primary-key.html
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Computer Software question: What is primary key? Answer Key that wont have any duplicates (no repitititon of data) means ? a relational table uniquely ...
http://wiki.answers.com/Q/What_is_primary_key
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P cont. Primary key · Privilege · Procedure · Process · Program · Protocol · Proxy copy · Pseudo-column ...
http://www.orafaq.com/wiki/Category:P
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This column (or columns) is called the primary key. Primary key ensures that no duplicate or null values are entered in the column (or columns) defined as ...
http://www.ucertify.com/article/What-is-a-primary-key.html
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Listing added: Apr 8, 2008)
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A primary key is a single field or combination of fields that uniquely defines a record. ... In Oracle, a primary key can not contain more than 32 columns. ...
http://www.techonthenet.com/oracle/primary_keys.php
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