$query_Recordset1 = "SELECT * FROM camere WHERE NOT EXISTS (SELECT * FROM prenota WHERE camere.numero_camera = prenota.numero_camera AND prenota.data_arrivo<='$partenza' AND prenota.data_partenza>='$arrivo')";
$query_Recordset1 = "SELECT * FROM camere WHERE NOT EXISTS (SELECT * FROM prenota WHERE camere.numero_camera = prenota.numero_camera AND prenota.data_arrivo<='$partenza' AND prenota.data_partenza>='$arrivo')";