I have a Car table in my Sql Data and every car has own BrandId that declared every Brands in "Brands" table as a foreign key. I'm just wondering what if I want to add two different BrandId together in my one Car>BrandId Column, what would I do? How can it be possible for adding two features as a foreign key in one spesific column?
Here is my Car Tables Code
CREATE TABLE [dbo].[Cars] (
[CarId] INT IDENTITY (1, 1) NOT NULL,
[CarName] VARCHAR (255) NULL,
[ColorId] INT NULL,
[BrandId] INT NULL,
[ModelYear] VARCHAR (255) NULL,
[DailyPrice] DECIMAL (18) NULL,
[Details] VARCHAR (255) NULL,
PRIMARY KEY CLUSTERED ([CarId] ASC),
FOREIGN KEY ([ColorId]) REFERENCES [dbo].[Colors] ([ColorId]),
FOREIGN KEY ([BrandId]) REFERENCES [dbo].[Brands] ([BrandId])
);
And here te code of my Brands table;
CREATE TABLE [dbo].[Brands] (
[BrandId] INT IDENTITY (1, 1) NOT NULL,
[BrandName] VARCHAR (255) NULL,
PRIMARY KEY CLUSTERED ([BrandId] ASC)
);
You can simply create your table as follows :
CREATE TABLE [dbo].[Cars] (
[CarId] INT IDENTITY (1, 1) NOT NULL,
[CarName] VARCHAR (255) NULL,
[ColorId] INT NULL,
[BrandId1] INT NULL,
[BrandId2] INT NULL,
[ModelYear] VARCHAR (255) NULL,
[DailyPrice] DECIMAL (18) NULL,
[Details] VARCHAR (255) NULL,
PRIMARY KEY CLUSTERED ([CarId] ASC),
FOREIGN KEY ([ColorId]) REFERENCES [dbo].[Colors] ([ColorId]),
FOREIGN KEY ([BrandId1]) REFERENCES [dbo].[Brands] ([BrandId]),
FOREIGN KEY ([BrandId2] REFERENCES [dbo].[Brands] ([BrandId])