我如何列出与PHP中的while循环相同的id数据？

我有一个mysql表.这样的专栏

series_id, series_color, product_name

我应该列出与group一样的series_id产品.

我想像那个列表所有相同的saries_id回应我的屏幕那样

A12 Series Product

 - Milk  
 - Tea 
 - sugar
 - water

B12 Series Product

 - Water 
 - Banana 
 - Cofee 
 - Tea

解决方法:

通过series_id订购结果,因此所有具有相同价值的产品将在一起.

$stmt = $pdo->prepare("SELECT series_id, product_name
                       FROM yourTable
                       ORDER BY series_id");
$stmt->execute();

然后在显示结果时,显示Series标题并开始一个新的< ul>每当它改变时：

$last_series = null;
echo "<ul>\n";
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
    if ($row['series_id'] != $last_series) {
        if ($last_series) {
            echo "</ul></li>\n";
        }
        echo "<li>" . $row['series_id'] . " Series Product\n";
        echo "<ul>\n";
        $last_series = $row['series_id'];
    }
    echo "<li>" . $row['product_name'] . "</li>\n";
}
if ($last_series) {
    echo "</li>\n";
}
echo "</ul>\n";