php - 从 foreach 中取出我的 sql 以获得我的代码

Question

我有这样的php代码：

$q = $db->query("SELECT * FROM tabe1_data WHERE status='1' ORDER BY id DESC LIMIT 10");
$cr_onr = array();
while($row = $db->fetchAll($q))
{
    $cr_onr[] = $row;
}


?>

<?php foreach($cr_onr as $new_cr_onr):?>

<?php $crinfo = $db->fetchOne("SELECT * FROM tabe2_data WHERE id ='".$new_cr_onr['op_id']."'");?>

<p><?=$new_cr_onr['username'];?> has been complete <?=$crinfo['op_amount'];?></p>

<?php endforeach;?>

我需要在$crinfo = $db->“foreach”之前取出“foreach”

请问我该怎么做？

谢谢你。

Answer 1

单连接查询？

SELECT tabe2_data.*
FROM tabe2_data
LEFT JOIN tabe1_data ON tabe1_data.op_id = tabe2_data.id
WHERE tabe1_data.status='1'

Answer 2

您可以加入表而不是进行许多查询：

$q = $db->query("

    SELECT
        *
    FROM
        tabe1_data
    INNER JOIN
        tabe2_data ON tabe1_data.op_id = tabe2_data.id
    WHERE
        tabe1_data.status='1'
    ORDER BY
        tabe1_data.id DESC
    LIMIT 10

");

$cr_onr = array();

while($row = $db->fetchAll($q))
{
    $cr_onr[] = $row;
}


?>

<?php foreach($cr_onr as $new_cr_onr):?>

<p><?=$new_cr_onr['username'];?> has been complete <?=$new_cr_onr['op_amount'];?></p>

<?php endforeach;?>