php查询失败的'订单子句'

Question

我的错误与我的PHP项目。错误如下。 我该如何解决这个问题？我没有在PHP太多经验

注意：查询失败：未知列“P.id”“以条款”

警告：mysql_fetch_object（）：提供的参数不是一个有效的MySQL结果资源

<?php 
      $search= ""; 
      if(isset($_POST['btnsearch'])) 
      { 
       $search="WHERE p.product_description LIKE '%".$_POST['search']."%'"; 
      } 
      else 
      { 
       $search=""; 
      } 

      $query = mysql_query("SELECT 
             p.id, 
             p.product_description, 
             p.product_category, 
             p.album_name, 
             p.date, 
             pd.product_name 
             FROM 
             product AS p 
             INNER JOIN product_detail AS pd ON p.id = pd.product_id 
             ".$search." 
             GROUP BY p.id 
             ORDER BY P.id ASC 
             ") or trigger_error('Query Failed: ' . mysql_error()); 

      while ($row = mysql_fetch_object($query)) 
      { 
       ?> 

           <tr> 
            <td><img style="width:100px; height=100px;" src="<?php echo 'upload/' .$row->product_name?>"></td> 
            <td class="center"><?php echo $row->album_name ?></td> 
            <td class="center"><?php echo $row->product_description ?></td> 
            <td class="center"><?php echo $row->product_category ?></td> 
            <td class="center"> 
             <?php echo $row->date ?> 
            </td> 
            <td class="center"> 

             <a class="btn btn-info" href="edit.php?id=<?php echo $row->id ?>"> 
              <i class="halflings-icon white edit"></i> 
             </a> 
             <a class="btn btn-info" href="view.php?id=<?php echo $row->id ?>"> 
              <i class="halflings-icon white edit"></i> 
             </a> 
             <a class="btn btn-danger" onclick="return confirm('Are you sure to delete this Image ?');" href="delete.php?id=<?php echo $row->id ?>"> 
              <i class="halflings-icon white trash"></i> 
             </a> 
            </td> 
           </tr> 


         <?php 
          } 

         ?> 

Answer 1

区分大小写？尝试更改ORDER BY P.id ASC与ORDER BY p.id ASC