SELECT *, ((obmen_site.mi_dali_s - obmen_site.oni_dali_s) / 100 * obmen_site.coi) as count_users FROM obmen_new, obmen_category, obmen_site WHERE obmen_new.category = obmen_category.id and obmen_new.pokazivat = '1' and obmen_new.admin_proveril = '1' and obmen_site.rabotaet = '1' and obmen_new.category = '$_GET[category]' and obmen_new.site_id = obmen_site.id GROUP BY obmen_site.id ORDER BY count_users, obmen_new.rating DESC