SQL Oracle仅返回列值的max（value）

Question

我的数据如下所示。

我希望看到的输出是：

这是我写的一个查询，它还不存在，但是我知道我应该做的逻辑。我需要采用与vehicle_size和竞争对手相同的column（rate）的最大值。这可以用更好的方式编写，所以如果有人可以指出我正确的方向，我将不胜感激。

下面是我的查询：

SELECT RENTAL_DATE, OUTBOUND, INBOUND CASE WHEN Competitor = 'kay' AND VEHICLE_SIZE= 'Small' THEN MAX(RATE) WHEN COMPETITOR = 'lola' AND VEHICLE SIZE = 'Small'THEN MAX(RATE) WHEN Competitor = 'kay' AND VEHICLE_SIZE= 'Large' THEN MAX(RATE) WHEN COMPETITOR = 'lola' AND VEHICLE SIZE = 'Large'THEN MAX(RATE) ELSE 'RATE' END AS RATE FROM FORMATTED2018AND2019DATA;

第二个查询：

select Rental_date, outbound, inbound, vehicle_size, max(rate) where competitor='lola' and vehicle_size = 'small' OR 'large' max(Rate)where competitor ='kay' and vehicle_size = 'small' OR 'large' from table2 group by Rental_date, outbound, inbound, vehicle_size,

Answer 1

尝试以下-

select  Rental_date, competitor,outbound, inbound, vehicle_size, 
        max(rate) 
        from table2 
        group by 
        Rental_date, competitor,outbound, inbound, vehicle_size