Question

在我的数据库中，我有一个名为db_pilots的表格，我正试图找到来自国家的总数，即来自GB的飞行员总数。它正是这样做的，但它按location而不是total排序。我怎样才能做到这一点？

<?php
$country_info = DB::get_results('SELECT COUNT(pilotid) as total, location FROM'.TABLE_PREFIX.'pilots GROUP BY location DESC');

foreach($country_info as $country)
{

?>
    <tr>
        <td align="center"><img src="<?php echo Countries::getCountryImage($country->location); ?>" /></td>
        <td align="center"><?php echo Countries::getCountryName($country->location); ?></td>
        <td align="center"><?php echo $country->total;?></td>
    </tr>

<?php
}
?>

Answer 1

尝试添加ORDER BY：


...GROUP BY location ORDER BY total DESC

Answer 2

FROM之后你错过了一个空格：

FROM'.TABLE_PREFIX.'pilots
    ^

应该是这样的：

FROM '.TABLE_PREFIX.'pilots

获得“位置”的总数

2 个答案: