如何在php中删除表格单元格

我有3个字段，其中一个是我根据id选择的类型文件：

 $qryz="SELECT * FROM claims_follow_up.Reconciliation_Details where   id_rd ='$id_rd' ";
    $res = mysqli_query($dbc, $qryz);
  $dd=mysqli_fetch_array($res);

<label> Client Name</label> 
 <input type="text" name= "Client_Name"  value="<?=$dd['Client_Name']?></br>
 <label>Activity</label> 
 <input type="text" name= "Activity"  value="<?=$dd['Activity']?> " ></br>
<label>PDF_Report1</label> 
 <a href="uploads/<?php echo $dd['PDF_Report1'] ?>"  target="_blank"><?php echo $dd['PDF_Report1'] ?></a> 
  <?php echo '<a href="del_file.php?id_rd='.$dd['id_rd'].' " class="btn btn-primary btn-xs btn-danger" onclick="return confirm(\'Do you really want to delete this file ?\')"><i class="glyphicon glyphicon-trash"></i>Delete file #1</a>';?>

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谢谢

您不能从单行中删除列，您可以

为整个表删除列

，

删除

整行或

更新

列值非常感谢您，我没有想到更新查询，我使用更新，这没关系。。

  $id_rd  = $_GET["id_rd"] ;  
 $sql="delete PDF_Report1 from claims_follow_up.Reconciliation_Details where id_rd = '$id_rd' ";