 GO --添加 产品 外键
 ALTER TABLE [Products]  WITH CHECK ADD  CONSTRAINT [FK_Products_Suppliers] FOREIGN KEY([SupplierID])
		REFERENCES [Suppliers] ([SupplierID]) 
 GO --约束检查
 ALTER TABLE [Products] CHECK CONSTRAINT [FK_Products_Suppliers] 
 

 GO --添加 产品 外键
 ALTER TABLE [Products]  WITH CHECK ADD  CONSTRAINT [FK_Products_Categories] FOREIGN KEY([CategoryID])
		REFERENCES [Categories] ([CategoryID]) 
 GO --约束检查
 ALTER TABLE [Products] CHECK CONSTRAINT [FK_Products_Categories] 
 

