gridview yii2中每个状态的计数

在第一列的gridview中有一个国家列表。下一列是状态列。在sql中，我得到的结果如下

SELECT COUNT(*) FROM order_customFields
INNER JOIN `order` ON order_customFields.order_id = `order`.order_id
WHERE
order_customFields.order_customFields_delivery_method = 'us' AND
order_customFields.order_customFields_order_date >= '2016-12-01' AND
order_customFields.order_customFields_order_date <= '2016-12-31' AND
`order`.order_status = 'sent'

如何计算每个状态和每个国家的订单数量？像这样

SELECT 
    order_customFields.order_customFields_delivery_method,
    sum(case `order`.order_status when 'new' then 1 else 0 end) newtcount,
    sum(case `order`.order_status when 'arrived' then 1 else 0 end) arrivedcount,
    sum(case `order`.order_status when 'sent' then 1 else 0 end) sentcount
FROM order_customFields
  INNER JOIN `order` ON order_customFields.order_id = `order`.order_id
WHERE
  order_customFields.order_customFields_order_date >= '2016-12-01' AND
  order_customFields.order_customFields_order_date <= '2016-12-31' 
GROUP BY    
   order_customFields.order_customFields_delivery_method,
   `order`.order_status