Entity Relationship Diagram

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Which is the redundant relationship in this ER Diagram and why?

Which is the redundant relationship in this ER Diagram and why? A few of my friends and I have been trying to figure it out but keep going in circles. where the attributes of each entity are as ...
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The nature of the relationship between two tables in MySQL

Good day. I'm designing a database for a research project where we're predicting whether or not young female athletes will rupture their ACL(s) based on the nature of a test jump recorded with a ...
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Entity relationship modelling, comment on my ERD

Note: Due to low reputation I can't post images so i have added the links accordingly. I have this assignment I'm working and I am stuck in a recursive relationship, following is part of the case ...
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How do I model the database for an application containing canvases which are divided into building blocks?

How should I model my database if I wanted to have this functionality: I want to be able to create a canvas which has many building blocks (they are something like it's sections). There are many ...
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ERD diagram may or may not statement

I am getting ready for college exam and one of the questions for ERD is to represent: A newspaper advertises many properties and a property may or may not be advertised in a number of newspapers. ...