Question: Consider an entity set Person, with attributes social security number (ssn), name, nickname, address, and date of birth (dob). Assume that the following conditions hold:

Consider an entity set Person, with attributes social security number (ssn), name, nickname, address, and date of birth (dob). Assume that the following conditions hold:

no two persons have the same ssn

no two persons have the same combination of name, address, and dob

assume that all persons have an ssn, a name and a dob, but that some persons dont have a nickname nor an address.

List all candidate keys and all superkeys for this entity set.

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