Question

我正在尝试编写一个脚本，显示互联网商店中特定产品的其他产品。根据价格和类别显示的产品。例如，如果您选择主板脚本将向其显示硬盘冷却器ets的其他产品。价格范围必须由管理员指定。问题是代码返回重复的产品。我试过使用group by，在MySQL查询中有所不同。我也尝试在PHP中使用数组唯一函数。两者都没有奏效。什么可能解决这个问题？现在代码如下所示。

if(isset($product_info['related_kv4nt_id_2'])) {
    $i=1;
                        $imax = 5;
                        while ($i < $imax) {
$product_sql_test2 = $this->db->query("SELECT p.product_id, p.price,    pc.product_id AS product_id
FROM oc_product p
INNER JOIN oc_product_to_category pc ON p.product_id = pc.product_id
WHERE p.price  BETWEEN '".$product_info['related_kv4nt_min_2']."' and '".$product_info['related_kv4nt_max_2']."'
AND pc.category_id =  '".$product_info['related_kv4nt_id_2']."'
GROUP BY pc.product_id
ORDER BY RAND( ) 
LIMIT 0 , 10");                        if(isset($product_sql_test2->row['product_id'])){$this->data['product_spec_2_'.$i.''] = $product_sql_test2->row['product_id'];}
$i++;
}
}

Answer 1

尝试

GROUP BY product_id

或喜欢

GROUP BY p.product_id

pc.product_id AS product_id

将此更改为

pc.product_id AS p_id

并尝试分组

GROUP BY p_id

查询返回重复的结果

1 个答案: