Question

我有两张表：发票和订单

发票包含

   +----------------+---------------+-------------+------------+
   | orderInvoice   | orderCustomer | orderTime   | orderTotal |
   +----------------+---------------+-------------+------------+
   | 00001          | Nick          | 2012-11-29  | 30.00      |
   | 00002          | Andrew        | 2012-11-29  | 15.00      |
   | 00003          | West          | 2012-11-29  | 80.00      |
   +----------------+---------------+-------------+------------+

订单列表包含

   +----------------+------------------+------+--------+
   | orderInvoice   |   item  |  size  | Qty  | price  |
   +----------------+------------------+------+--------+
   | 00001          |   Coke  |   Can  | 20   | 0.50   |
   | 00001          |   Coke  | Bottle | 10   | 2.00   |
   | 00002          |  Sprite |   Can  | 30   | 0.50   |
   | 00003          |   Coke  | Bottle | 40   | 2.00   |
   +----------------+------------------+------+--------+

我想这样输出：

   +---------------------------------------------------+
   | Most Popular Soda                                 |
   +---------------------------------------------------+
   | Coke Bottle         50                            |
   | Sprite Can          30                            |
   | Coke Can            20                            |
   +---------------------------------------------------+
   | 2012-11-29                                        |
   +---------------------------------------------------+

我尝试使用concat（）作为ITEM进行查询，然后计数（ITEM）。看起来我可以在一个查询中一起使用它们。

------------ ---------------- UPDATE

谢谢你们发布答案。我想出了答案（如果没有你的帮助，就无法做到）。我将在那里留下答案，以防其他人也在寻找它

SELECT
CONCAT(
    orderlist.item,
    orderlist.size
) AS item,
orderlist.orderInvoice,
SUM(orderlist.Qty) AS Qty
FROM
    orderlist
INNER JOIN invoice ON nvoice.orderInvoice = orderlist.orderInvoice
WHERE
    Invoice.orderTime = '2012-11-29'
GROUP BY
    item
ORDER BY
    Qty DESC

Answer 1

试试这个

select item,sum(qty) as quantity from orderlist group by item;

Answer 2

试试这个：

Select item, size, SUM(qty) quantity
from 
orderlist
group by item, size

order by quantity desc

如何从2个表中获取大多数项目列表

2 个答案: