I don't know loll this is so funny
Foreign keys isnt drawn at a ER-diagram. The relation drawn between entities is enough to show, that der is at foreign key
In an Entity-Relationship (ER) diagram, key constraints are represented by underlining the attribute(s) that form the primary key for an entity. This indicates that the attribute(s) uniquely identify each instance of the entity. Additionally, for foreign keys, a dashed underline can be used to denote attributes that reference primary keys from other entities, highlighting their role in establishing relationships.
Extended ER diagram is a variant of ER diagram. EER include ER diagram + hierarichal concept. Extended ER diagram is also called Enhance ER diagram(EER).
supermarket (ER-Diagram)
I 'm need ER diagram for websit news
ER Diagram of online shopping
Er diagram of on line shopping
How do you draw a ER diagram for a automobile industry?
draw the er diagram for tours
You also can draw your ER diagram by so many ways. A software called Edraw is a better software to draw the ER diagram. This one has some ready-to-use ER diagrams templates conceptdraw.com/How-To-Guide/er-diagram
what is example of ER diagram for rental car company ?
Er diagram of human resource managenent system