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讲解FD set留学生、讲解R编程设计、辅导BCNF、R设计辅导 辅导Python编程|辅导R语言编程

Assignment 2
Please make sure that you always use notations consistent with lecture notes.
Different notations will not be accepted. The deadline for assignment 2 is:
Mon 08 Apr, 10:00 am
Question 1 (8 marks)
Consider a relation and its FD set
2) List all the candidate keys for . (2 marks)
3) Find a minimal cover for . (2 marks)
4) Decompose into a set of 3NF relations if it is not in 3NF. Make sure your decomposition
is dependency-preserving and lossless-join. Justify your answers. (3 marks)
Question 2 (12 marks)
Consider a relation and its FD set.
1) How many super keys can be found for R? Compute the total number of super keys and
list 5 of them. (2 marks)
2) Determine the highest normal form of ? with respect to ?. Justify your answer. (2 marks)
3) Regarding F, is the decomposition
dependency-preserving? Please justify your answer. (2 marks)
4) Regarding F, is the decomposition
lossless-join? Please justify your answer. (3 marks)
5) Decompose it into a collection of BCNF relations if it is not in BCNF. Make sure your
decomposition is lossless-join and briefly justify your answers. (3 marks)
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