สอบถามเรื่องการ insert into หน่อยครับ ไม่สามารถ insert into ลงฐานข้อมูลได้ ท่านผู้ชำนาญ ช่วยดูให้ทีครับผม

.....
$last_ids = mysqli_insert_id($con);

               $query2 = sprintf('select * from orders_tmp ');
               $result2 = mysqli_query($con,$query2);
               if (mysqli_num_rows($result2)>0) {
               for ($i=1;$i<=mysqli_num_rows($result2);$i++) {
                   $rs2 = mysqli_fetch_array($result2);

                   $query3 = sprintf('insert into orders_detail  value(null,%s,"%s",%s,"%s")',
                   $last_ids,$rs2['pro_no'],$rs2['pro_amount'],$rs2['seat_tube']);
                   $result3 = mysqli_query($con,$query3);
             }}

<?php
$query = sprintf('select * from orders_tmp where pro_no="%s" and seat_tube="%s" ',
	s($con,$_POST['pro_no']),
        s($con,$_POST['seat_tube']));
$result = mysqli_query($con,$query);

if (mysqli_num_rows($result)>0) {
	$rs = mysqli_fetch_array($result);

	$query2 = sprintf(
		'update orders_tmp set pro_amount="%s" where od_id=%s',
		s($con,$_POST['amount']) + $rs['pro_amount'],$rs['od_id']);
	$result2 = mysqli_query($con,$query2);
} else 
    {
	$query = sprintf(
		'insert into orders_tmp value(null,"%s",%s,"%s")',
		s($con,$_POST['pro_no']),
		s($con,$_POST['amount']),
                s($con,$_POST['seat_tube']));
	$result = mysqli_query($con,$query) or die(mysqli_error($con));
}
msgbox('เพิ่มลงตะกร้าแล้ว','basket.php');
?>