SQL：从每个客户处获取最新订单

Question

我试图在我的主索引页面上显示最近订单的产品我有这个代码它工作正常，但我想在其中添加订单产品拇指，它存储在ecs_goods goods_thumb

    function index_get_recent_buy_query()
    {
        $sql = 'SELECT ecs_users.user_name, ecs_order_goods.goods_id,
                 ecs_order_goods.goods_name, order_info.add_time, order_info.consignee
                FROM ecs_users, 
                (
                    SELECT order_id, user_id, add_time, consignee
                    FROM ecs_order_info
                    ORDER BY ecs_order_info.add_time DESC 
                    LIMIT 0 , 20
                ) AS order_info, 
                ecs_order_goods
                WHERE order_info.order_id = ecs_order_goods.order_id
                AND order_info.user_id = ecs_users.user_id;';

        $all = $GLOBALS['db']->getAll($sql);

$ arr [$ idx] ['goods_thumb'] = get_image_path（$ row ['goods_id']，$ row ['goods_thumb']，true）;

我有goods_id，但我很困惑如何在上面的SQL查询中包含来自ecs_goods的goods_thumb

Answer 1

这是查询部分。我在ecs_goods字段中添加了goods_id表的连接，并在goods_thumb子句中添加了SELECT字段。

SELECT ecs_users.user_name, ecs_order_goods.goods_id,
ecs_order_goods.goods_name, order_info.add_time, order_info.consignee, ecs_goods.goods_thumb
FROM ecs_users, 
(
    SELECT order_id, user_id, add_time, consignee
    FROM ecs_order_info
    ORDER BY ecs_order_info.add_time DESC 
    LIMIT 0 , 20
) AS order_info, 
ecs_order_goods, ecs_goods
WHERE order_info.order_id = ecs_order_goods.order_id
AND order_info.user_id = ecs_users.user_id
AND ecs_goods.goods_id = ecs_order_goods.goods_id;