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Chapter 4 · DatabasePractice
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CONCEPT PRACTICE

Primary key uniqueness and non-NULL constraints

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2023 Spring · Morning · Q26

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Q26. Which of the following is the key of a relation schema R = (M, N, O, P, S, T), when R has the functional dependencies shown below? O → T S → M OS → P M → N Source visual transcription: R=(M,N,O,P,S,T). Dependencies:O→T;S→M;OS→P;M→N.

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Source: 2023S_FE_AM_Questions.pdf, PDF page 11. ID: 2023S-AM-Q026. Explanation written for this textbook.

Original question · Q26
Q26. Which of the following is the key of a relation schema R = (M, N, O, P, S, T), when R has the functional dependencies shown below? O → T S → M OS → P M → N Source visual transcription: R=(M,N,O,P,S,T). Dependencies:O→T;S→M;OS→P;M→N.

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