รบกวนสอบถามเกี่ยวกับการ insert ข้อมูลลง db ใหม่หน่อยครับ

$nameSQL = "SELECT * FROM nc_customers WHERE Customer_NO = '$Customer_NO'";

$namequery = mysql_query($nameSQL);

if (mysql_num_rows($namequery) == 0)
{
	$FetchArray = mysql_fetch_array($namequery);
	mysql_fetch_array ($namequery);
	mysql_close();
	
	$sql = "insert into nc_customers (Customer_NO , Name_Thai ) values ('$Customer_NO' , '$namethai')";
	$query = mysql_query($sql);
	mysql_close();

	echo "<meta http-equiv = 'refresh' content = '10; url=wklist.php'> ";
}