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    <pre><code>GROUP BY 10800*FLOOR(`time`/10800) </code></pre> <p>However if you've got records (say) at 2:59 and 3:01, these will be reported as 2 seperate records in the output. If you want to measure contiguous runs, then you'll need to do something similar to your current code - however you can store the results in the DB so as not to calculate them again - just add a new column which references the row designated as the start of the session:</p> <pre><code>ALTER TABLE besucher ADD COLUMN session_start INTEGER; </code></pre> <p>Then....</p> <pre><code>$limit = 3 /*std*/ * 60 /*min*/ * 60 /*sek*/; $since=(integer)(file_get_contents('lastrun'))-$limit; $besucher_query = mysql_query('SELECT ip, `time`, `agent` FROM `besucher` WHERE `time`&gt;$since ORDER BY agent, ip, `time` ASC'); while($besucher = mysql_fetch_array($besucher_query)) { $newtime = $besucher['time']; $newagent = $besucher['agent']; $newip = $besucher['ip']; if ($newagent!=$oldagent || $newip &lt;&gt; $oldip || $newtime&gt;$oldtime+$limit || $newtime&lt;$oldtime) { $sessionstart=$newtime; } $newagent=mysql_real_escape_string($newagent); mysql_query( "UPDATE besucher SET session_start=$sessionstart WHERE time=$newtime AND ip=$newip AND agent='$newagent'" ); $oldtime = $besucher['time']; $oldagent = $besucher['agent']; } file_put_contents('lastrun', $oldtime); </code></pre> <p>Then you can get the number of sessions from (for example)....</p> <pre><code>SELECT COUNT(*) FROM (SELECT DISTINCT ip, agent, session_start FROM bessucher WHERE time BETWEEN $a AND $b) ilv </code></pre> <p>Bu a simpler solution is to use session management in your code and populate this immediately.</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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