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QusWhat is a key attribute in the relational model? QusWhat is a key attribute in the relational model?
A. An attribute that uniquely identifies each tuple in a relation.
B. An attribute that can take on multiple values.
C. An attribute that is used for sorting data.
D. An attribute that is optional for each tuple in a relation.
Solution
A. An attribute that uniquely identifies each tuple in a relation.
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