What is the inheritance symbol used in ERD diagram?

Question

I am certain that the inheritance symbol used in ERD diagram is the triangular symbol.

However, I am uncertain of the symbol used in UML diagram that is used to symbolize inheritance.

I have searched on the Internet and I have seen the symbol of a circle icon with an underline below it.

May I know which is the correct inheritance symbol used in UML diagram?

Thank you

Answer 1

Both Generalization as Realization have a triangle endpoint.

The difference is the dotted line for Realization (implementation) vs the solid line for Generalization (inheritance).

Answer 2

In the world of ER modeling, what you are describing is called generalization/specialization. Another phrase is "is-a relationships. For a related wikipedia article, click here and scroll down to UML.