如何从另一个数据库中将特定行添加到数据库中？

Question

我想通过单击“添加”按钮将特定行从数据库传递到另一个数据库。我的dbconnection包含在它的顶部。

Here is the my table

这是我的代码

<table style="margin-left: 28%;">
  <tr>
     <th><h2>Product Code</h2></th>
     <th><h2>Products and Services</h2></th>
     <th><h2>Amount</h2></th>
     <th><h2>Action</h2></th>
 </tr>
 <tr>
  <?php
    $select_query = "SELECT * FROM products_and_services";
    $select_result = mysqli_query($connection,$select_query);
  ?>

  <?php while ($rows = mysqli_fetch_row($select_result)):; 
    $id = $rows[0];
    $prod_code = $rows[1];
    $service = $rows[2];
    $amount = $rows[3];
  ?>
  <td style="text-align: center;"><?php echo $rows[1]; ?></td>
  <td style="text-align: center;"><?php echo $rows[2]; ?></td>
  <td style="text-align: center;"><?php echo $rows[3]; ?></td>
  <td style="text-align: center;"><a href="" name="add">Add</td>
  <?php
    if(isset($_POST['add'])){
      $sql = "INSERT INTO temp_table (Product_name,Product_price,Product_ID) 
      VALUES ('$service','$amount','$id')";
      mysqli_query($db,$sql);
    }
  ?>
 </tr>
  <?php endwhile ?>