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我有以下结构表Subsonic 3.0.0.3在列名上获取不同的项目。 ActiveRecord的
CREATE TABLE [dbo].[CityDistancesMin](
[Id] int identity(1,1) not null,
[City1] [int] NOT NULL,
[City2] [int] NOT NULL,
[Car] [nvarchar](50) NOT NULL,
[Distance] [int] NOT NULL,
CONSTRAINT [PK_CityDistancesMin] PRIMARY KEY CLUSTERED
(
[Id] ASC
) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF,
ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
ON [PRIMARY]
我需要一种方式来获得亚音速3.0.0.3城市的不同的ID。例如,在SQL那就只能是Select distinct City1 from CityDistancesMin
我尝试做以下
SqlQuery query = new Select(CityDistancesMinTable.City1Column)
.From< CityDistancesMinTable>();
query.Aggregates = new List<Aggregate> {
new Aggregate(CityDistancesMinTable.City1Column, AggregateFunction.GroupBy)
};
但我发现了以下错误:
Can't decide which property to consider the Key - you can create one called 'ID' or mark one with SubSonicPrimaryKey attribute"
我试图重新命名Id
到ID
但它似乎没有帮助。