php ajax datatable

// function datatable
function viewData(){
    $(document).ready(function() {
    $('.data').DataTable({
        "processing": true,
        "serverSide": true,
        "ajax": "core/process.php",
        success : function(data){
            $('tbody').html(data);
          }
      })
    });
  }

//query dengan pdo
 $stmt = $db->prepare("SELECT * FROM pelanggan");
  $stmt->execute();
  $no = 1;
  while($row = $stmt->fetch()){
?>
  <tr>
    <?php $result[]=$row;?>
    <td><?php echo $no++;?></td>
    <td><?php echo $row['id_pelanggan'];?></td>
    <td><?php echo $row['nm_pelanggan'];?></td>
    <td><?php echo $row['alamat'];?></td>
    <td><?php echo $row['telepon'];?></td>
    <td><?php echo $row['email'];?></td>
    <td width="160">
      <button class="btn btn-warning" data-toggle="modal" data-target="#edit-<?php echo $row['id_pelanggan']; ?>">Edit</button>
      <button type="button" class="btn btn-danger" onclick="deleteData(<?php echo $row['id_pelanggan']?>)"> Delete </button>
    </td>
  </tr>
  <?php
  }