1.

Consider attributes ID, CITY and NAME. Which one of this can be considered as a super key?(a) NAME(b) ID(c) CITY(d) CITY, IDThis question was posed to me in an interview for internship.The doubt is from Keys topic in division The Relational Model of Database Management

Answer»

The CORRECT option is (b) ID

Explanation: Here the id is the only ATTRIBUTE which can be taken as a KEY. Other attributes are not uniquely identified.



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