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Posted by Marek Kilimajer on 06/03/05 16:48
Brian Dunning wrote:
> I am using a routine to find 50 random records in a large MySQL
> database (about a million records) where I generate a list of 50 random
> unique ID's,
why can't you use the where condition in the above query?
> and then use MySQL's "in" command to find them. I can't
> use "order by rand()" due to its performance hit.
>
> But I have to take it one more step: I want to first limit my found set
> to those matching a different search criteria, and then find 50 of those.
>
> Anyone? Can this be done all within MySQL, or is it going to require
> some humongo PHP arrays?
>
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