I have the following E-R diagram to refer to: enter image description here

I have a question posed to me that entity 4 IS a weak entity due to one of its relations. However, from what I see, entity 4 has a composite primary key made up of l, m, and n, none of which are partial keys and weak entities would not have any primary keys, only foreign or partial keys. I only see the relationship between entity 3 and 4 somehow causing it to be a weak entity, but I am unsure. I saw this post already, but it almost re-iterated what I was thinking unless I understood it wrong.

  • 1
    And what is exactly your question? Apr 8, 2022 at 19:45
  • Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking.
    – Community Bot
    Apr 8, 2022 at 20:10


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