Question

我已经写了代码来搜索数据。但是，当我运行代码时，它没有显示任何错误，也没有获取任何数据。谁能帮我找出问题所在？

这里是我的密码

<?php 
    $db = new PDO('mysql:dbname=mypro_bms;host=localhost', 'root', '');
    $people = [];
    if (!empty($_GET['p'])) {

        $count='count';
        $sum='sum';
        $stmt=$db->prepare("SELECT passport_IC,count(*) as count,sum(blood_bag) as sum  FROM donate GROUP BY passport_IC where passport_IC like :passport_IC");
        $stmt->execute([
        ':passport_IC' => '%' . $_GET['p'] .'%',
        ':count'=> $count,
        ':sum' => $sum,
        ]);  


        $people = $stmt->fetchAll(PDO::FETCH_OBJ);
    }
?> 
    <table class="table table-bordered">
        <tr>
            <th><center> passport </center></th>
            <th><center> Donation Completed</center></th>
            <th>blood donated</th>
            <th><center> Percentage</center></th>
        </tr>
<?php foreach($people as $donors): ?>
        <tr>
            <td><center><b><font color="black"><?= $donors->passport_IC; ?></font></b></center></td>
            <td><center><b><font color="black"><?= $donors->count; ?>*Times*</font></b></center></td>
            <td><center><b><font color="black"><?= $donors->sum; ?>ml</font></b></center></td>
        </tr>
<?php endforeach; ?>
    </table>

Answer 1

您的查询错误。分组依据应在where子句之后。

SELECT passport_IC,count(*) as count,sum(blood_bag) as sum  FROM donate where passport_IC like :passport_IC GROUP BY passport_IC

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