$sql['... ' & get_lang('Statistics_the_past_minute')] = "SELECT count(DISTINCT access_user_id) AS number FROM dokeos_stats.track_e_lastaccess WHERE DATE_ADD(access_date, INTERVAL 1 MINUTE) >= NOW()";
$sql['... ' & get_lang('Statistics_the_past_hour')] = "SELECT count(DISTINCT access_user_id) AS number FROM dokeos_stats.track_e_lastaccess WHERE DATE_ADD(access_date, INTERVAL 1 HOUR) >= NOW()";
$sql['... ' & get_lang('Statistics_the_past_day')] = "SELECT count(DISTINCT access_user_id) AS number FROM dokeos_stats.track_e_lastaccess WHERE DATE_ADD(access_date, INTERVAL 1 DAY) >= NOW()";
$sql['... ' & get_lang('Statistics_the_past_month')] = "SELECT count(DISTINCT access_user_id) AS number FROM dokeos_stats.track_e_lastaccess WHERE DATE_ADD(access_date, INTERVAL 1 MONTH) >= NOW()";