Question: With cardinalities in database.Please explain what it means when maximum cardinality is 1:N and minimum cardinality is 0:1 for sale and employee as example.

With cardinalities in database.Please explain what it means when maximum cardinality is 1:N and minimum cardinality is 0:1 for sale and employee as example.

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Can someone explain what means that maximum cardinality in a database is 1:N and minimum cardinality is 0:1 for a relationship between sale and employee .

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