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votes
1answer
709 views

How to show levels of User Roles in ERD?

I felt this is the best place to ask this, rather than Stackoverflow as it is not related to programming. Ok. The thing is I need to draw an ERD of a leave management system. Suppose there are three ...
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2answers
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Types of ER Diagrams

I'm currently taking a class for database design, and we're using the ER diagram style designed by Peter Chen. I have a couple of problems with this style: Keys in relationships don't seem ...