RE: [PHP] Any clever ideas on how to find some random records?

From: Date: Tue, 26 Apr 2005 16:15:21 +0000
Subject: RE: [PHP] Any clever ideas on how to find some random records?
References: 1  Groups: php.general 
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[OP] I have a MySQL database with about a million records. I'd like to use the SQL command "order by RAND()" but my ISP won't let me: whenever the server gets spidered, Google overloads their MySQL server because of all the overhead of that command. I can't just cloak the spiders because I need them to find the random pages. So...what I've been doing for small sets of records is to use PHP to generate a bunch of random record ID's, then I construct a long SQL statement to find all the matching records. This works, but if I want to generate a big index page to list a hundred or a thousand records, it could get pretty clunky. Anyone have any better suggestions? :) [/OP] Well, not knowing what the random records are used for and not really knowing how random they need to be ;) I might suggest just selecting a random number and then select all the records after it until you have the amount you need. Probably not the best solution, but might work for you. --Codefox

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