Hi, I have tried following an example for a Hash of Hash to add an extra layer but it has not worked. When I try to get hold of the third and final hash the keys are not found in the second hash. The data structure is. Database (Pages (Page Hits or instances))) I can get hold of the pages but not the page instances. Here is the code: 
dbmopen (%hitsdb,$db,0755) || print "can't dbmopen hitsb: $!";


if ($hitsdb{$page}) {
    $key = "$Year$Month$hour$referer";
    print $key;
    
    if ($hitsdb{$page}->{$key}) {
        $hitsdb{$page}->{$key}->{'counter'}++;
        
        print "increment instance";
    }
    else {
        %hitsdb = (
            $page => {
                $key => {
                    'year' => $Year,
                    'month' => $Month,
                    'day' =>  $month_day,
                    'referer' => $referer,
                    'counter' => 1
                }
            }
        );
        
        print "new instance";
    }
}
else {
    $key = "$Year$Month$hour$referer";
    print $key;
    %hitsdb = (
        $page => {
            $key => {
                'year' => $Year,
                'month' => $Month,
                'day' =>  $month_day,
                'referer' => $referer,
                'counter' => 1
            }
        }
    );
    
    print "new instance and page";
}

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In reply to Hash of Hashes of Hashes by James

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