On Sat, 12 Feb 2011 22:40:27 +0200
Andre Polykanine <[email protected]> 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!
select * from (select * from `CandidateQuestions` order by rand() ) t group by
`Category`;
>
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
>
--
Simcha Younger <[email protected]>
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
