In a Students table with columns StudentID, FirstName, LastName, and Email, which combination of columns can be considered a super key?Group of answer choicesEmailStudentIDStudentID, FirstNameAll of the above
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 choicesEmailStudentIDStudentID, FirstNameAll of the above
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, one or more, that can uniquely identify a record in a table.
Looking at the options:
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Email: This could be a super key, assuming that each student has a unique email.
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StudentID: This could also be a super key, as each student should have a unique ID.
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StudentID, FirstName: This could be a super key as well, as the combination of StudentID and FirstName will be unique for each student.
So, the answer is "All of the above", given that each of these combinations can uniquely identify a record in the Students table.
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