带范围的Mysql查询案例和带货币的案例

Question

我有一个表'order',其中列几乎看起来像这样:

| order_id | shop_id | order_total | currency | created_at |

现在我想进行查询,返回一个如下所示的表:

| interval | currency | sum |

其中interval是日期的间隔,currency是货币,sum是该区间中该货币的所有订单的总和.一个例子可能是:

| 2012-08-12-2012-09-12 | EUR | 540922 |

| 2012-08-12-2012-09-12 | DKK | 43215  |

| 2012-09-12-2012-10-12 | EUR | 123643 |

| 2012-09-12-2012-10-12 | DKK | 0      |

我已经有了一个指导货币的查询,但我不知道如何让它考虑到货币..任何想法？

下面是我现在使用的查询示例.真正的查询当然是由代码生成的,这只是一个例子.

SELECT CASE
         WHEN created_at BETWEEN '2012-08-12' AND '2012-09-12' THEN '2012-08-12-2012-09-12'
         WHEN created_at BETWEEN '2012-09-12' AND '2012-10-12' THEN '2012-09-12-2012-10-12'
         WHEN created_at BETWEEN '2012-10-12' AND '2012-10-14' THEN '2012-10-12-2012-10-14'
       end AS intrvl,
       Sum(order_total)
FROM   `order` o
WHERE  shop_id = 4
       AND created_at BETWEEN '2012-08-12' AND '2012-11-17'
GROUP  BY CASE
            WHEN created_at BETWEEN '2012-08-12' AND '2012-09-12' THEN '2012-08-12-2012-09-12'
            WHEN created_at BETWEEN '2012-09-12' AND '2012-10-12' THEN '2012-09-12-2012-10-12'
            WHEN created_at BETWEEN '2012-10-12' AND '2012-10-14' THEN '2012-10-12-2012-10-14'
          end  

/莫滕

Answer 1

在您的select和group by子句中添加货币

SELECT CASE
         WHEN created_at BETWEEN '2012-08-12' AND '2012-09-12' THEN '2012-08-12-2012-09-12'
         WHEN created_at BETWEEN '2012-09-12' AND '2012-10-12' THEN '2012-09-12-2012-10-12'
         WHEN created_at BETWEEN '2012-10-12' AND '2012-10-14' THEN '2012-10-12-2012-10-14'
       end AS intrvl,
       currency, 
       Sum(order_total)
FROM   `order` o
WHERE  shop_id = 4
       AND created_at BETWEEN '2012-08-12' AND '2012-11-17'
GROUP  BY CASE
            WHEN created_at BETWEEN '2012-08-12' AND '2012-09-12' THEN '2012-08-12-2012-09-12'
            WHEN created_at BETWEEN '2012-09-12' AND '2012-10-12' THEN '2012-09-12-2012-10-12'
            WHEN created_at BETWEEN '2012-10-12' AND '2012-10-14' THEN '2012-10-12-2012-10-14'
          end,
          currency