'ISA Inheritance with different primary keys in ER Diagram
I want to draw an ER diagram for a company where there are engineers and architects as workers. I created three entites and I want to create an ISA inheritance from engineers to workers. All the workers have a unique worker_id. All the engineers also have a unique engineer_id. How can I show that each engineer has both unique worker_id and engineer_id with using ISA inheritance?
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