vb.org Archive - selecting 10 random online users (is very difficult)

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- - selecting 10 random online users (is very difficult) (https://vborg.vbsupport.ru/showthread.php?t=57924)

Tae-Hwan

10-15-2003 09:41 PM

selecting 10 random online users (is very difficult)

i have found no simple way to do this. i'd really love to have someone come along and make me feel very, very stupid... because i have been working on this for several days without avail.

SELECT DISTINCT ... ORDER BY RAND(NOW())

does not work on any version of mysql.

Code:

  $loggedins2=$DB_site->query("SELECT DISTINCT session.userid,username,invisible

                              FROM session

                              LEFT JOIN user ON (user.userid=session.userid)

                              WHERE session.userid>0 AND session.lastactivity>$datecut AND invisible != 1

                              ORDER BY RAND(NOW())");

^ this is what i'd like to have on index.php

thanks in advance for your help. :)

Xenon

10-15-2003 10:31 PM

hmm, normally this should work, but you can also try to save the users into an array first and then randomize the array.

NTLDR

10-15-2003 10:58 PM

Works fine for me on MySQL 4.0.15, you'll need to add LIMIT 10 on the end to limit it to just 10 online users though.

Tae-Hwan

10-16-2003 12:35 AM

thanks guys.. i finally got it. :) i had been misled by some other information i had read about the mysql fixes for the "SELECT DISTINCT ... ORDER BY RAND()" errors for 3.23.05

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