Explain your answer for full credit. 1. Find the candidate keys of the relation

Question

Explain your answer for full credit. 1. Find the candidate keys of the relation R(A,B,C) and a set of functional dependencies F are A B B {A,C}

2. Find the candidate keys of the relation (A,B,C,D,E,F) and a set of functional dependencies F are A B B A {B,C} D C E

3.Find the highest normal form for the Relation R and a set of functional dependencies F. Explain your answer for full credit

a). R(A,B,C,D,E) F = {A {B,C}, {B,C} {A,D}, D E}

b) R = {A, B, C, D, E, F, G, H, I} F = { {A, B} -> {C}, {A} -> {D, E}, {B} -> {F}, {F} -> {G, H} {D} -> {I, J} }

4.Flag this Question Question 3 30 pts Decompose the previous R{A, B, C, D, E, F, G, H, I} into each higher normal form relations above its current NF. For example, if its current NF is 0NF, then you need to decompose R to 1NF relations, 2NF relations, upto 3NF relations or BCNF relations if possible.

Explanation / Answer

Hi,

Its against chegg policy to post multiple questions as one, please post others as separate questions so that we can help you :)
A candidate key is r set of columns, in a table that can uniquely identify any database record of the relation,
1. In this relation R(A,B,C), given dependencies are
A->B and B->{A,C}
implies, if we only have A, we can determine A(since itself) and B(first dependency given) and from B we can get C and B(itself)
therefore using only 'A' we can get all A,B,C hence A is candidate key
Thumbs up if this was helpful, otherwise let me know in comments

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