在表中查看mysql数据库查询的数据

我正在尝试更新我的网页的搜索功能的代码，现在它不返回任何东西。我已经用了一段时间了，但没有得到任何东西。

<form method="post" action="words_results1.php">
<table align="center">
  <tr>
<td>Keyword</td>
<td><input type="text" name="Keyword" /></td>
</tr>
  <tr>
    <td>Author</td>
    <td><input type="text" name="Author" /></td>
  </tr>
  <tr>
    <td valign=bottom>Words Posted<BR />on or before</td>
    <td valign=top>
      <table>
        <tr>
          <td width="33%">Day</td>
          <td width="33%">Month</td>
          <td width="34%">Year</td>
        </tr>
        <tr>
      <td>
            <select name=Day>
            <?php
              echo '<option></option>';
              for($count = 1; $count <= 31; ++$count)
              {
                echo "<option>$count</option>";
              }
            ?>
            </select>
          </td>
          <td>
            <select name=Month>
            <?php
              echo '<option></option>';
              for($count = 1; $count <= 12; $count++)
              {
                 echo "<option value=$count>".date("M", mktime(0,0,0,$count,1, 2000))."</option>";
              }
            ?>
            </select>
          </td>
          <td>
            <select name=Year>
             <?php
              echo '<option></option>';
              for($count = date("Y"); $count >= 1997; $count--)
              {
                echo "<option>$count</option>";
              }
            ?>
            </select>
          </td>
        </tr>
      </table>
    </td>
  </tr>
  <tr>
    <td colspan=2 align=center>
      &nbsp;<BR />
      <input type="submit" value="Search" />
      &nbsp;&nbsp;&nbsp;
      <input type="submit" name="cancel" value="Cancel" />
    </td>
  </tr>
</table>    
</form>

<?php 
if(isset($_POST['cancel']))
  {
    echo("index.html");
    exit;
  }
  $qry_string = "SELECT * FROM Words";
  $search = "";
  if(!empty($Keyword))
  {
    $End_String = "(Word LIKE '%$Keyword%' OR Title LIKE '%$Keyword%')";
    $search .="&Keyword=$Keyword";
  }
  if(!empty($Author))
  {
    if(isset($End_String))
    {
      $End_String .= " AND (Author LIKE '%$Author%')";
    }
    else
    {
      $End_String = "(Author LIKE '%$Author%')";
    }
    $search .="&Author=$Author";
  }
  if(!empty($Day))
  {
    if(isset($End_String))
    {
      $End_String .= " AND (DAYOFMONTH(Date_Created) = '$Day')";
    }
    else
    {
      $End_String = "(DAYOFMONTH(Date_Created) = '$Day')";
    }
    $search .="&Day=$Day";
   }
  if(!empty($Month))
  {
    if(isset($End_String))
    {
      $End_String .= "AND (MONTH(Date_Created) = '$Month')";
    }
    else
    {
      $End_String = "(MONTH(Date_Created) = '$Month')";
    }
    $search .="&Month=$Month";
  }
  if(!empty($Year))
  {
    if(isset($End_String))
    {
      $End_String .= " AND (YEAR(Date_Created) = '$Year')";
    }
    else
    {
      $End_String = "(YEAR(Date_Created) = '$Year')";
    }
    $search .="&Year=$Year";
  }
  if (!isset($offset)) $offset=0;
  if(isset($End_String))
  {
    $qry_string = $qry_string." WHERE ".$End_String . " ORDER BY Date_Created DESC LIMIT $offset,101";
  }
  else
  {
    $qry_string = $qry_string." ORDER BY Date_Created DESC LIMIT $offset,101";
  }
//  echo $qry_string . "<P><HR><P>";
  $result = mysql_query($qry_string);
echo mysql_error();
?>

最后一位是组成表格的代码，我有一个假设，问题出在这里，但老实说，我不确定

<table style="margin: 5px 15px; 5px 20px;" align="center" bgcolor="#666666" border="0" cellpadding="3" cellspacing="1">
    <tbody><tr style="background: #04C1DE; font-family: Verdana; font-weight: bold; font-size: 18px;">
      <td style="width: 50%; padding: 5px;">
        Word
    </td>
      <td style="width: 20%; padding: 5px;">
        Author
      </td>
      <td style="width: 10%; padding: 5px;">
        Date
      </td>
      <td>Category</td>
        <td>Active?</td>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
    </tr>
  </tbody>
    </tr>
  <?php
  $count = 1;
    $bgc = 0;

  while($row = mysql_fetch_array($sql))
  {
    if ($count > 100) break;
    echo '<tr style="background: ';
        if ($bgc==0) echo "#FFFFFF";
        else echo "#CFEBFD";
        $bgc == 0?$bgc=1:$bgc=0;
    echo ';">';
    echo "<td><a href=../../words/display_word.php?ID=$row[ID]>$row[Title]</a></td>";
    echo "<td>$row[Author]</td><td>$row[Display_Date]</td><td>$row[category]</td>";
    if($row[active])
    {
      echo "<td>YES</td>";
    }
    else
    {
      echo "<td>NO</td>";
    }
    echo "<td>$row[link_count]</td>";
    if($row[Title] != "")
    {
      echo "<td><a href=words_edit.html?ID=$row[ID]>Edit</a></td></tr>";
    }
    else
    {
      echo "</tr>";
    }
    $count++;
  }
 ?>