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php-db | 2001062

Re: [PHP-DB] advantages/disads of primary keys and indices? From: Manuel Lemos (mlemos <email protected>)
Date: 06/22/01

Hello Noah,

On 22-Jun-01 21:17:35, you wrote:

>what are the advantages and disadvantages of primary keys and indices?

A primary key is a unique index.

Use indexes for the fields that will be most looked up in the first
condition of the WHERE clause of your SQL queries, especially if your
tables will hold many values, but beware that indexes also take disk space.

Regards,
Manuel Lemos

Web Programming Components using PHP Classes.
Look at: email protected>?subject=Re:%20[PHP-DB]%20advantages/disads%20of%20primary%20keys%20and%20indices?&replyto=618.573T978T13634015mlemos <email protected>">mlemos <email protected>">http://phpclasses.UpperDesign.com/?user=mlemos <email protected> 

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