The entity relationship diagram in Figure A-1 shows all tables in the FoodStore database.
Figure A-1 FoodStore database entity relationship diagram
Figure A-2 shows the conceptual view of the FoodStore entity data model that is generated by Visual Studio. Notice that the ProductInvoice and ProductPurchaseOrder bridge tables are absent, yet are present in the entity relationship diagram in Figure A-1.
Figure A-2 FoodStore entity data model conceptual view