Where can I learn ER diagrams?

Question

ER diagrams describe RDBMS at higher level but where can I get a good explanation of it.

Answer 1

• https://www.tutorialspoint.com/dbms/er_diagram_representation.htm

• https://www.geeksforgeeks.org/introduction-of-er-model/

• https://beginnersbook.com/2015/04/e-r-model-in-dbms/