在SQL Server的子查询中获取最小价格(使用DISTINCT)?

你需要添加一个GROUP BY子句并去掉DISTINCT:

SELECT 
       datepart(year,[Registration]) AS YearRegistered, 
       MIN(SalePrice), Model, Make
FROM 
       [VehicleSales] 
GROUP BY 
       datepart(year,[Registration]), Model, Make

SELECT  DATEPART(year,[Registration]) AS YearRegistered, Model, Make, MIN(SalePrice)
FROM    [VehicleSales]
GROUP BY
        DATEPART(year,[Registration]) AS YearRegistered, Model, Make