'Primary key bid' presentation slideshows

Summary on Translating ER Diagra ms

Summary on Translating ER Diagra ms. A may not do B No minimum requirement A should do B at least once Minimum requirement: 1 A can do B many times No upper limit A can do B at most once Upper limit: 1 A does B exactly once A does B 1 or more times A does B 0, 1, or more times

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