Question

$foot = mysql_query("SELECT count(*) 
                       FROM tblQA 
                      WHERE intResponseID = '' 
                        AND cCategory = 'Football' as qcount, 
                    (SELECT max(dPostDateTime) 
                       FROM tblQA 
                      WHERE intResponseID = '' 
                        AND cCategory = 'Football') as lastq");


$football = mysql_fetch_array($foot);

echo "<td class='forum'>" . $footbll['qcount'] . "</td>";
echo "<td class='forum'>" . $footbll['lastq'] . "</td>";

这不会在我的表格中显示任何内容。我没有发布整个HTML代码，我的表结构很好。

Answer 1

使用：

$foot = mysql_query("SELECT COUNT(*) AS qcount,
                            MAX(dPostDateTime) AS lastq
                      FROM tblQA 
                     WHERE intResponseID = '' 
                       AND cCategory = 'Football' ");

$football = mysql_fetch_array($foot);

echo "<td class='forum'>" . $football['qcount'] . "</td>";
echo "<td class='forum'>" . $football['lastq'] . "</td>";

我重写了你的查询，它可以在一个语句中完成。

Answer 2

如果这是您的文字代码，则$footbll中会出现拼写错误。

Answer 3

你应该有类似的东西：

while ($football = mysql_fetch_array($foot)) {
    echo "<td class='forum'>" . $football['qcount'] . "</td>";
    /* yadda yadda yadda */
}

您的代码中也有一些拼写错误。

Answer 4

我认为你错过了,所在的组合器：...qcount, (SELECT...

Answer 5

查询没有任何意义，我非常惊讶它会在您的数据库GUI中返回一些内容。

如果您不想更改语法，则必须执行以下操作：

SELECT (SELECT COUNT(*) FROM tblQA) AS qcount, (SELECT MAX(dPOstDateTime) FROM tblQA) AS lastq -- i didn't add the conditions

但是，通过执行此查询可以轻松完成：

SELECT COUNT(*) AS qcount,
       MAX(dPostDateTime) AS lastq
FROM tblQA
WHERE intResponseID = ''
    AND cCategory = 'Football'

请注意intResponseID听起来像是一个整数，你把它与空字符串比较似乎很奇怪......

Answer 6

好的，这是我的解决方案。我弄清楚了：

$foot = mysql_query("SELECT count(*), max(dPostDateTime) FROM tblQA WHERE intResponseID = '' AND cCategory = 'Football'");

$football = mysql_fetch_assoc($foot);


echo "<td class='forum'><center>" . $football['count(*)'] . "</center></td>";
echo "<td class='forum'><center>" . $football['max(dPostDateTime)'] . "</center></td>";

我哪里错了？ SQL查询

6 个答案: