如何从订单表中获得最受欢迎的产品？

Question

我有这样的订单表

 Id  | Order_id | item_id | restaurant_id | price
--------------------------------------------------
  1 |  1        |  1      |   2            | 200
---------------------------------------------------
  2 |  2         |  1      |  2             | 200
---------------------------------------------------
  3 |  3        |  2       |  2             | 400

如何在restaurant_id为2的情况下按升序从订单表中获取热门商品。 我想要这样的东西 热门商品

1 
2

我尝试但是我只得到总计数而且我被困在那里

SELECT COUNT(item_id) FROM `item_orders` WHERE restaurant_id = 1

Answer 1

通过这种方式，您可以获得每个项目的计数并按计数

进行排序

SELECT  item_id, COUNT(*)
FROM    `item_orders`
WHERE   restaurant_id = 1
GROUP BY item_id
ORDER BY COUNT(*) DESC

Answer 2

试试这个;

select * from 
(SELECT COUNT(item_id) as count FROM `item_orders` 
WHERE restaurant_id = 1) as T 
order by `count` asc