SophiaPretty

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Category > Computer Science Posted 04 Jan 2018 My Price 7.00

Consider the following relation R, and assume

Consider the following relation R, and assume that each of the following letters represents an attribute in R:

R (A, B, C, D, E, F)

 

Suppose the following dependencies exist:

A, B -> C, D, E, F

B -> D

E -> F

 

Draw a relational schema for your 1NF relation and diagram the functional dependencies.

Draw a relational schema for your 2NF relations, diagram the functional dependencies, and show the referential integrity constraints.

Draw a relational schema for your 3NF relations, diagram the functional dependencies, and show the referential integrity constraints.

 

I believe I can diagram the functional dependencies if I can just get the relational schemas correct. Here is what I have come up with, but I think it is completely on the wrong track. I have underlined the Primary Keys in each.

 

1NF - R (A, B, C, D, E, F)

 

2NF - R (A, C, D, E, F)

          R (B, C, D, E, F)

 

3NF - R (A, C, D, E, F)

          R (B, C, D, E, F)

          R (B, D)

          R (E, F)

 

Answers

SophiaPretty
(5)
Status NEW Posted 04 Jan 2018 12:01 PM My Price 7.00

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