order by pid desc加到这个语句的那个位置？该怎么处理

order by pid desc加到这个语句的那个位置？

PHP code

<?php$sql = "SELECT `subject`, `author`, `fid` ,`first`,`tid`,`pid`  FROM `forum_post` WHERE 1 "; $result = mysql_query($sql) or die("查询失败!");     $number = 6; while ($row=mysql_fetch_array($result))  {     if ($row['fid'] ==56 && $row['first'] !=0 && $number != 0)     {         ?>         <tr>            <td><a href="message/mes.php?id=<?php echo $row['pid'];?>"><h3>            <?php echo substr($row['subject'],0,64);$number--;?></h3></a></td>               <td><a href="message/mes.php?id=<?php echo $row['pid'];?>"><h3>            <?php echo substr($row['author'],0,16);?></h3></a></td>        </tr>        <?php     }}?>

order by pid desc加到这个语句的那个位置？
$sql = "SELECT `subject`, `author`, `fid` ,`first`,`tid`,`pid` FROM `forum_post` WHERE 1 ";
我试了好几个地方都报错。
我需要让他降序排列

[解决办法]
WHERE 1 之后
[解决办法]
SELECT `subject`, `author`, `fid` ,`first`,`tid`,`pid` FROM `forum_post` WHERE 1
order by pid desc
[解决办法]
语句最后，limit之前

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