mysql同一个表，多种条件的多种排序

mysql同一个表，多种条件的多种排序，这里使用了php结合mysql实现

/**
 * 这里是一个以Yii框架开发的一个程序，其他框架同理
 *
 * 示例使用场景介绍：
 * 1、一个类似滴滴的APP订单列表
 * 2、订单状态为 1, 2, 3, 4 的始终在其他状态的前面
 * 3、订单状态为 1, 2, 3, 4 的按照订单生成时间倒序排
 * 4、订单状态不为 1, 2, 3, 4 的始终在 1, 2, 3, 4 状态的后面
 * 5、订单状态不为 1, 2, 3, 4 的按照订单生成时间倒序排
 */
public function actionDemo()
{
    $page = 10;
    $limit = 5;
    $offset = ($page - 1) * $limit;

    $where = 'order_status IN( 1, 2, 3, 4 )';
    $whereNot = 'order_status NOT IN( 1, 2, 3, 4 )';

    $Order = Order::find()->select(['order_id', 'order_status'])->where($where);
    $totalCount = $Order->count();

    if ($list = $Order->offset($offset)->limit($limit)->orderBy('order_id DESC')->asArray()->all()) {

        if ( ( $count = $limit - count($list) ) != 0 ) {
            $listNews = Order::find()->select(['order_id', 'order_status'])->where($whereNot)->offset(0)->limit($count)->orderBy('order_id DESC')->asArray()->all();

            $list = array_merge($list, $listNews);
        }

    } else {

        $offset -= $totalCount;

        $list = Order::find()->select(['order_id', 'order_status'])->where($whereNot)->offset($offset)->limit($limit)->orderBy('order_id DESC')->asArray()->all();
    }

    $this->returnAsJson(200, '', $list);
}

例子二：

/**
 * 活动列表
 * 
 * 要求：进行中的在最前面，其次未开始、已结束
 * 
 * @param int $page
 * @return array
 */
public static function getList($page = 1)
{
    $where = "activity_delflag = 1 AND activity_online = 1";

    $limit = 10;
    $offset = ($page - 1) * $limit;
    $time = time();

    // 进行中where
    $whereConduct = $where . " AND {$time} > activity_start_time AND {$time} < activity_end_time";
    // 未开始where
    $whereNotBegin = $where . " AND {$time} < activity_start_time";
    // 已结束where
    $whereEnd = $where . " AND {$time} > activity_end_time";

    $Activity = self::find();
    $countConduct = $Activity->where($whereConduct)->count();
    $countNotBegin = $Activity->where($whereNotBegin)->count();
    $offsetNotBegin = $offset - $countConduct;
    $offsetEnd = $offsetNotBegin - $countNotBegin;

    if ($list = $Activity->where($whereConduct)->offset($offset)->limit($limit)->asArray()->all()) {

        if (($count = $limit - count($list)) != 0) {
            $listNews = $Activity->where($whereNotBegin)->offset(0)->limit($count)->asArray()->all();

            $list = array_merge($list, $listNews);

            if (($count = $limit - count($list)) != 0) {
                $listNews = $Activity->where($whereEnd)->offset(0)->limit($count)->asArray()->all();

                $list = array_merge($list, $listNews);
            }
        }

    } else if ($list = $Activity->where($whereNotBegin)->offset($offsetNotBegin)->limit($limit)->asArray()->all()) {

        if (($count = $limit - count($list)) != 0) {
            $listNews = $Activity->where($whereEnd)->offset(0)->limit($count)->asArray()->all();

            $list = array_merge($list, $listNews);
        }

    } else {

        $list = $Activity->where($whereEnd)->offset($offsetEnd)->limit($limit)->asArray()->all();
    }

    return $list;
}