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Given the STUDENTS relation as shown below.




For (StudentName, StudentAge) to be the key for this instance, the value X should not be equal to

  • a)
    18

  • b)
    19

  • c)
    16

  • d)
    17

Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Given the STUDENTS relation as shown below.For (StudentName, StudentAg...
There is already an entry with same name and age as 19. So the age of this entry must be something other than 19.
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Given the STUDENTS relation as shown below.For (StudentName, StudentAge) to be the key for this instance, the value X should not be equal toa)18b)19c)16d)17Correct answer is option 'B'. Can you explain this answer?
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