SQL帮助-新手

Question

我正在为一个朋友收拾残局。他的网站曾经工作过，并从他的数据库中提取特色产品，但现在似乎不起作用了。它只是显示错误！！

任何帮助都将不胜感激。。。。我对SQL不是很了解。

这是代码：

<?php
require_once('const.php');
$link = dbConnect();
$query = "SELECT *
          FROM vehicle_tbl, manufacturer_tbl
          LEFT JOIN image_tbl ON vehicle_tbl.vehicle_id = image_tbl.vehicle_id  
          WHERE vehicle_tbl.manufacturer_id = manufacturer_tbl.manufacturer_id AND
                vehicle_tbl.vehicle_feature2 = '1' 
          GROUP BY vehicle_tbl.vehicle_id
          ORDER BY RAND()
          LIMIT 1";
$result = false;
$result = @mysql_query($query, $link);
$fmain = false;
if (($result) && (@mysql_num_rows($result) > 0)) {
    $fmain = @mysql_fetch_array($result, MYSQL_ASSOC);
    @mysql_free_result($result);
}
$query = "SELECT *
          FROM vehicle_tbl, manufacturer_tbl
          LEFT JOIN image_tbl ON vehicle_tbl.vehicle_id = image_tbl.vehicle_id  
          WHERE vehicle_tbl.manufacturer_id = manufacturer_tbl.manufacturer_id AND
                vehicle_tbl.vehicle_feature1 = '1' 
          GROUP BY vehicle_tbl.vehicle_id
          ORDER BY RAND()
          LIMIT 6";
$offers = false;
$offers = @mysql_query($query, $link);
function nextOffer() {
    global $offers;
    if ($offers && ($row = mysql_fetch_array($offers))) {
        if (! isset($row['image_name'])) { // no image
            $image = 'images/noimagesml.jpg';
        } else {
            $image = 'images/vehicles/sml/'.stripslashes($row['image_name']);
        }
        $title = stripslashes($row['manufacturer_name']).' '.stripslashes($row['vehicle_model']);
        $price = number_format((float) $row['vehicle_price_pcm'], 2);
        $id = (int) $row['vehicle_id'];
        echo '<table width="100%"  border="0" cellspacing="0" cellpadding="0">
                          <tr>
                            <td class="contenthead"><table width="100%"  border="0" cellspacing="0" cellpadding="0">
                              <tr>
                                <td width="11" height="40" align="left" valign="top"><img src="images/featre_left_hd.gif" width="11" height="23"></td>
                                <td width="100%" align="left" valign="middle" class="contenthead">'.$title.'</td>
                                <td width="11" height="40" align="right" valign="top"><img src="images/featre_rght_hd.gif" width="11" height="23"></td>
                              </tr>
                            </table></td>
                          </tr>
                          <tr>
                            <td class="contentpane"><table width="100%"  border="0" cellspacing="5" cellpadding="0">
                              <tr>
                                <td align="center" valign="middle"><img src="'.$image.'" width="100" height="58" class="bordered" alt="'.$title.'"></td>
                              </tr>
                              <tr>
                                <td align="center" valign="top" class="princing">from just &pound'.$price.' pcm</td>
                              </tr>
                              <tr>
                                <td align="right" valign="middle"><a href="cardeal.php?vehicle='.$id.'"><img src="images/more_butt.gif" width="54" height="20" border="0"></a></td>
                              </tr>
                            </table></td>
                          </tr>
                        </table>';
    } else {
        echo 'Error!!';
    }
}
?>

Answer 1

显示如下mysql错误：

mysql_query($query, $link) or die(__FILE__ . ' Line ' . __LINE__ . ': ' . mysql_error());

这将帮助您进行调试。

附言：mysql_*函数已弃用-http://php.net/manual/en/mysqlinfo.api.choosing.php