Question

我在SQL中遇到查询问题。我需要生成的查询是输出过去一个月销售的最昂贵汽车的详细信息。

到目前为止我的SQL代码如下：

SELECT CarMake, MAX(CFSSellingPrice) AS ['PriceOfCar']
FROM CarForSale
WHERE CFSSoldDate BETWEEN CVDATE('01/02/2013') AND CVDATE('01/03/2013')
GROUP BY CarMake;

我遇到的问题是输出多辆车，并且在过去一个月内也没有正确生产最贵的车。

任何帮助都会非常感激，即使有人能指出我正确的方向。

感谢您的时间，

Alyn :)

Answer 1

您的查询包含cvdate()，因此我猜您使用的是MS Access。如果是这样，您可以使用top 1查找销售最昂贵的汽车：

SELECT  top 1 CarMake
,       CFSSellingPrice
FROM    CarForSale
WHERE   CFSSoldDate BETWEEN CVDATE('01/02/2013') AND CVDATE('01/03/2013')
order by 
        CFSSellingPrice desc

Answer 2

使用Top关键字

SELECT Top 1 CarMake, MAX(CFSSellingPrice) AS ['PriceOfCar']
    FROM CarForSale
    WHERE CFSSoldDate BETWEEN CVDATE('01/02/2013') AND CVDATE('01/03/2013')
    GROUP BY CarMake;

Answer 3

尝试下面的

SELECT CarMake, MAX(CFSSellingPrice) AS ['PriceOfCar']
FROM CarForSale
WHERE CFSSoldDate BETWEEN CVDATE('01/02/2013') AND CVDATE('01/03/2013');

不要使用group by关键字...

Answer 4

此查询将为您提供所有记录，例如，如果有汽车制造商转向具有相同的售价且价格范围内的最高价格。

SELECT  CarMake, CFSSellingPrice
FROM    CarForSale
WHERE   CFSSellingPrice =
        (
            SELECT  TOP 1 CFSSellingPrice
            FROM    CarForSale
            WHERE   CFSSoldDate BETWEEN CVDATE('01/02/2013') AND 
                    CVDATE('01/03/2013')
            ORDER   BY CFSSellingPrice
        )

Answer 5

以下对我有用（使用format（）对您的汽车和销售进行分组，并在WHERE子句中使用子查询）

能够跨越几个月的额外好处。

SELECT 
  format(cfs.CFSSoldDate,"yyyy mm") AS SoldMonth
, cfs.CarMake
, MAX(CFSSellingPrice) AS PriceOfCar

FROM CarsForSale AS cfs

WHERE 
 cfs.CFSSoldDate BETWEEN #1/1/2013# AND #3/31/2013# 
 AND cfs.CFSSellingPrice = (SELECT 
     max(c.CFSSellingPrice) FROM CarsForSale AS c 
     WHERE format(c.CFSSoldDate, "yyyy mm") = format(cfs.CFSSoldDate, "yyyy mm"))

GROUP BY 
    format(cfs.CFSSoldDate, "yyyy mm"), cfs.CarMake

用于查找过去一个月销售最昂贵汽车的SQL查询

5 个答案: