mysql - 根据最大订单从 2 个不同的表中选择数据

Question

我需要从 2 个不同的表中选择数据，products 和 orders，orders 表将 productid 作为外键

我需要什么

我需要一个查询来显示产品表中的某些列，具体取决于订单表中的最大订单数

我的努力

我试过下面的查询

select sc_products.id, sc_products.name from sc_products, sc_orders where sc_orders.product = sc_products.id

问题

此查询只是通过复制产品表中的 ID 返回数据 作为

Full Texts          id  name
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt
    Edit    Delete  10  Black-White Cats
    Edit    Delete  10  Black-White Cats
    Edit    Delete  4   Aquarius Rhinestone T Shirt
    Edit    Delete  4   Aquarius Rhinestone T Shirt
    Edit    Delete  249     Volleyball Mom Blue Rhinestone T Shirt
    Edit    Delete  249     Volleyball Mom Blue Rhinestone T Shirt

上面的结果是我查询后显示的，我只需要显示那些被多次排序的记录，我需要那个count

更多关于我需要的东西

我需要如下结果

                            id  name                                        count
        Edit    Delete  9   3 Gold-Silver Elephants Rhinestone T Shirt   10
        Edit    Delete  10  product 2                                    15 

Answer 1

试试这个:

SELECT p.id, p.name, COUNT(o.id) orderCnt
FROM sc_products p 
INNER JOIN sc_orders o ON o.product = p.id
GROUP BY p.id HAVING COUNT(o.id) > 1
ORDER BY orderCnt DESC