Computer Science
Design Theory for Relational Database

Question Description

1.         Suppose R is a relation with attributes A1, A2,..., An. As a function of n, tell how many superkeys R has, if

1.1  The only key is A1.

1.2  The only key is A1 and A2.

1.3  The only key is {A1 A2} and {A3 , A4}.

1.4  The only key is {A1 A2} and {A1 , A3}.

Student has agreed that all tutoring, explanations, and answers provided by the tutor will be used to help in the learning process and in accordance with Studypool's honor code & terms of service.

Final Answer

Thank you for the opportunity to help you with your question!

if the only key is A1  R will have one superkeys

1.2 only key is A1 and A2 will have four superkeys

1.3 16 superkeys

1.4 100 superkeys


Please let me know if you need any clarification. I'm always happy to answer your questions.

JoelJoel (52)
Purdue University

Anonymous
Really useful study material!

Studypool
4.7
Trustpilot
4.5
Sitejabber
4.4