Answers for "one and only one in er diagram"

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one and only one in er diagram

use "zero or one" if it can be 0 or 1, {0, 1}
use "one and only one" if it can be 1, {1}
use "one" if it can be "zero or one" or "one and only one", {0, 1} ∪ {1}

Posted by: Guest on June-25-2021

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