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In a Students table with columns StudentID, FirstName, LastName, and Email, which combination of columns can be considered a super key?Group of answer choicesAll of the aboveStudentID, FirstNameStudentIDEmail

Question

In a Students table with columns StudentID, FirstName, LastName, and Email, which combination of columns can be considered a super key?Group of answer choicesAll of the aboveStudentID, FirstNameStudentIDEmail

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Solution

A super key in a database is a group of single or multiple keys which identifies rows in a table. It's a set of attributes, the values of which are unique for each tuple.

Looking at the options:

  1. StudentID, FirstName: This could be a super key, as the combination of StudentID and FirstName can be unique for each student.

  2. StudentID: This could also be a super key, as StudentID itself is unique for every student.

  3. Email: This could be a super key as well, as Email is unique for every student.

  4. All of the above: Since all the above options can be considered as super keys, this option is also correct.

So, the answer is "All of the above".

This problem has been solved

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