mysql选择count count id＃10

Question

当我运行以下代码时，echo返回资源ID＃10而不是数字，在我的情况下6.感谢任何帮助！

$result = mysql_query("SELECT COUNT(`category_id`) FROM `products_has_product_category`
WHERE `category_id`=1");
        echo $result;

Answer 1

使用函数mysql_fetch_object或mysql_fetch_row将查询结果转换为数据

$result = mysql_query("SELECT COUNT(`category_id`) as count FROM `products_has_product_category`
WHERE `category_id`=1");

$row = mysql_fetch_object($result);
$count = $row->count;
echo $count;

请参阅mysql_fetch_object