On 13/02/2011, at 9:40 AM, Andre Polykanine wrote:
> Hi all,
> I'm using in my PHP script the following four MySql queries:
> $q1=mysql_query("SELECT * FROM `CandidateQuestions` WHERE
> `Category`='1' ORDER BY RAND() LIMIT 1");
> $q2=mysql_query("SELECT * FROM `CandidateQuestions` WHERE
> `Category`='2' ORDER BY RAND() LIMIT 1");
> $q3=mysql_query("SELECT * FROM `CandidateQuestions` WHERE
> `Category`='3' ORDER BY RAND() LIMIT 1");
> $q4=mysql_query("SELECT * FROM `CandidateQuestions` WHERE
> `Category`='4' ORDER BY RAND() LIMIT 1");
>
> and here goes the question: is there a way to make these four in one
> so strictly one random question is selected from all of the four
> categories?
> Thanks!
>
> --
> With best regards from Ukraine,
> Andre
> Skype: Francophile
> Twitter: http://twitter.com/m_elensule
> Facebook: http://facebook.com/menelion
mysql_query('SELECT * FROM `CandidateQuestions` WHERE `Category` IN (1,2,3,4) ORDER BY RAND() LIMIT 1;'); should do it.
Though if there's no other possible values for Category, you could just remove the WHERE clause.
---
Simon Welsh
Admin of http://simon.geek.nz/
Who said Microsoft never created a bug-free program? The blue screen never, ever crashes!
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