สอบถามปัญหาคะ คือ php for ค่าลง table 2 table โดยบางตัวแปลก็ต้องใช้ร่วมกันคะ

<?php
include("../conn2/function.php");
include("../conn2/connect_db_server.php");
date_default_timezone_set("Asia/Bangkok");
$date_today=date("Y-m-d H:i:s"); 


        $countRecord33=$_POST["hdnLine"];
	$item_id=$_POST["item_id"];
	$amount=$_POST["amount"];
	$price_unit=$_POST["price_unit"];
	$listno=$_POST["listno"];
	$user_id=$_SESSION["user_id"];
	$po_code=$_POST["po_code"];
	$user_id2=$_POST["user_id"];


if ($add_receive == '3') {
	
	$strSQL = "SELECT * FROM  tb_item_receivehd where po_code = '$po_code' "; 
	
	$query=mysql_query($strSQL);
	$row=mysql_num_rows($query);
	if($row==0){
		
		
 // ทำการอัพเดทได้	
	$sql2 = mysql_query("INSERT INTO tb_item_receivehd (`receiveHD_id` ,`po_code` ,`listno`,`receive_date` ,`User_id` ,`create_date` ,`update_by` ,`update_date`) values ('','".$_POST["po_code"]."','$listno','$date_today','$user_id2','$date_today','0','0') ");
	if (!$sql2) {
	die(mysql_error());
}
	$receivedHD_id = mysql_insert_id();
	echo"$receivedHD_id<br>";
	$sql = "INSERT INTO tb_item_receivedt (`receiveDT_id` ,`receiveHD_id` ,`item_id` ,`amount` ,`price_unit` ,`ISdelete`,`update_by`,`update_date`) values  ";
	for($j=0;$j<=$countRecord33;$j++)
	#echo"$countRecord33";
	{

		if($_POST["item_id$j"] !="" 
		&& $_POST["amount$j"] !="" 
		&& $_POST["price_unit$j"] !="")
		
		{			
		    $sqlValue=$sql;
			
			
			$sqlValue .="('','$receivedHD_id','".$_POST["item_id$j"]."','".$_POST["amount$j"]."','".$_POST["price_unit$j"]."','0','0','0') ";
			$objQuery = mysql_query($sqlValue) or die($sqlValue);
		}
	}
	
	echo"<br>$sql";
	//////////////////////////////////////// update ราคา เป็น ปัจจุบัน/////////////////////////////////
	$sqlUp = "INSERT INTO tb_price_tiem_all (`price_itemID`,`item_id` ,`price_item`,`receiveHD_id_ref`,`create_date`) values  ";
	
	for($j=0;$j<=$countRecord33;$j++)

	{
		
		if($_POST["item_id$j"] !="" && $_POST["price_unit$j"] !="")
		
		{			
		    $sqlValue2=$sqlUp;
			
			
			$sqlValue2 .="('','".$_POST["item_id$j"]."','".$_POST["price_unit$j"]."','$receivedHD_id' ,'$date_today')";
			
			
			$objQuery2 = mysql_query($sqlValue2) or die($sqlValue2);
		}
	}
	

	if($$objQuery2){
	echo "<script language=\"JavaScript\">";
	echo "alert('บันทึกข้อมูลการรับเข้าเรียบร้อยแล้วค่ะ');";
	//echo "window.location='../system/receive_list.php';";
	echo "</script>";
}
else {
echo "<script language=\"JavaScript\">";
	echo "alert('บันทึกข้อมูลผิดพลาด');";
	//echo "window.location='../system/receive_list.php';";
	echo "</script>";

	}

	}else{
 	echo "<script language=\"JavaScript\">";
	echo "alert('เอกสารนี้มีการรับเข้าวัสดุไปแล้วคะ');window.location='../system/receive_list.php';";
	echo "</script>";
	exit;
}