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Answer to Question #75324 in Databases | SQL | Oracle | MS Access for Jonny
Question #75324
In an entity, an identifier is an attribute that uniquely identifies an instance of the entity. If ID is an integer attribute and is the identifier of entity X, how many times can ID 10 appear?
Once
Up to 10 times only
Never because it is the identifier
As many times as needed because it is the identifier
Once
Up to 10 times only
Never because it is the identifier
As many times as needed because it is the identifier
Expert's answer
Once
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