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2. Choose all of the correct answers for each of the following: [a] The relations of two sub-entity sets of the same super entity set have 1- The same keys 2- The same attributes 3- The same constraints 4- The same natural joins with their super entity set 5- All of the above 6- None of the above

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2. Choose all of the correct answers for each of the following: [a] The relations of two sub-entity...
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