โปรเจ็คจบ สอบถามเกี่ยวกับการใส่คำสั่งตัดstockหน่อยครับ

<table class="table  table-striped table-bordered table-info">
  <thead>
</div>
      <th scope="col">No.</th>
      <th scope="col">Part</th>
      <th scope="col">Dis.</th>
      <th scope="col">Branch</th>
      <th scope="col">QTY.</th>
      <th scope="col">เบิก</th>
      <th scope="col"></th>
      <th scope="col">คงเหลือ</th>



    </tr>
  </thead>
  <?php
  if(mysqli_num_rows($query) <1){
  ?>
  <tr>
    <td colspan="8"><div align="center">ไม่พบข้อมูล</div></td>
    
  </tr>
  <?php 
  }else{
while($result=mysqli_fetch_array($query,MYSQLI_ASSOC))
{//เเสดงข้อมูลทั้งหมดที่เราเลือกไว้
?>
  <tbody>
  <form action="#" method="post" onSubmit="return fncSubmit( this );" >
    <tr>
    <tr>
    <td><?php echo $result["id"];?></div></td>
    <td><?php echo $result["Part"];?></td>
    <td><?php echo $result["Dis"];?></td>
    <td><?php echo $result["Branch"];?></div></td>
    <td><?php echo $result["QTY"];?></td>
    <td><input type="hidden" name="id" value="<?php echo $result["id"];?>" size="2">
	<select id="txtQty" name="txtQty">
  <?php for($qty=0;$qty<=20;$qty++)
         {
          ?>
          <option value="<?php echo $qty;?>"><?php echo $qty;?></option>
          <?php
          }
          
          ?>              

                <td><input type="submit" id="request" name="request" class="btn btn-info btn-sm" value="เบิกวัสดุ"></td>
                <td><?php echo $result["QTY_NOW"];?></td>
          
      
					</select>
    			</td>
				</form>
  </tr>
<?php
}
}
?>
</table>
<center>
<br>
Total <?php echo $num_rows;?> Record : <?php echo $num_pages;?> Page :
<?php
if($prev_page)
{
	echo " <a href='$_SERVER[SCRIPT_NAME]?Page=$prev_page&txtKeyword=$strKeyword'><< Back</a> ";
}

for($i=1; $i<=$num_pages; $i++){
	if($i != $page)
	{
		echo "[ <a href='$_SERVER[SCRIPT_NAME]?Page=$i&txtKeyword=$strKeyword'>$i</a> ]";
	}
	else
	{
		echo "<b> $i </b>";
	}
}
if($page!=$num_pages)
{
	echo " <a href ='$_SERVER[SCRIPT_NAME]?Page=$next_page&txtKeyword=$strKeyword'>Next>></a> ";
}
if($page!=$num_pages)
{
	echo " <a href ='$_SERVER[SCRIPT_NAME]?Page=$next_page&txtKeyword=$strKeyword'>Next>></a> ";
}
mysqli_close($conn);
?>
    <script src="node_modules\jquery\dist\jquery.min.js"></script>
    <script src="node_modules\bootstrap\dist\js\bootstrap.min.js"></script>
    <script src="node_modules\popper.js\dist\umd\popper.min.js"></script>
    
</body>
</center>
</html>