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Marianna [84]
3 years ago
7

I came here for a answer so why did i get a pep talk

Computers and Technology
2 answers:
zloy xaker [14]3 years ago
7 0

Answer:

o

Explanation:

Llana [10]3 years ago
6 0

Answer:

idek my guy

Explanation:

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- Consider the relation R = {A, B, C, D, E, F, G, H, I, J} and the set of functional dependencies F = { {B, C} -> {D}, {B} -&
Olenka [21]

Answer:

The key of R is {A, B}

Explanation:

A key can be seen as a minimal set of attributes whose closure includes all the attributes in R.

Given that the closure of {A, B}, {A, B}+ = R, one key of R is {A, B} But in this case, it is the only key.

In order for us to to normalize R intuitively into 2NF then 3NF, we have to make use of these approaches;

First thing we do is to identify partial dependencies that violate 2NF. These are attributes that are

functionally dependent on either parts of the key, {A} or {B}, alone.

We can calculate

the closures {A}+ and {B}+ to determine partially dependent attributes:

{A}+ = {A, D, E, I, J}. Hence {A} -> {D, E, I, J} ({A} -> {A} is a trivial dependency)

{B}+ = {B, F, G, H}, hence {A} -> {F, G, H} ({B} -> {B} is a trivial dependency)

To normalize into 2NF, we remove the attributes that are functionally dependent on

part of the key (A or B) from R and place them in separate relations R1 and R2,

along with the part of the key they depend on (A or B), which are copied into each of

these relations but also remains in the original relation, which we call R3 below:

R1 = {A, D, E, I, J}, R2 = {B, F, G, H}, R3 = {A, B, C}

The new keys for R1, R2, R3 are underlined. Next, we look for transitive

dependencies in R1, R2, R3. The relation R1 has the transitive dependency {A} ->

{D} -> {I, J}, so we remove the transitively dependent attributes {I, J} from R1 into a

relation R11 and copy the attribute D they are dependent on into R11. The remaining

attributes are kept in a relation R12. Hence, R1 is decomposed into R11 and R12 as

follows: R11 = {D, I, J}, R12 = {A, D, E} The relation R2 is similarly decomposed into R21 and R22 based on the transitive

dependency {B} -> {F} -> {G, H}:

R2 = {F, G, H}, R2 = {B, F}

The final set of relations in 3NF are {R11, R12, R21, R22, R3}

4 0
3 years ago
Which situation is an example of? "relational context" in the transactional model of? communication?
Jlenok [28]
An example I believe of relational context is when I was out with my son on the weekend (he has a developmental disability) and we had agree I would buy him a 1/2 sub sandwich the day before but then he said I would like a McFlurry so I said okay and then he said so you mean I can have a McFlurry and a sub and I thought oh oh I stuck my foot in it so I said but it must be only a 1/2 sub so he said no I want a full sub then and no mcflurry so I agreed so from the original 1/2 sub idea the idea evolved to a full sub which was affected by the warm sunny summery weather in the afternoon and seeing people lined up at ice cream shops so the idea developed in relation to the weather, how hungry he was and the social aspect people buying ice cream.
8 0
3 years ago
How does Frankenstein feel about his creation?
velikii [3]

Answer:

he just regrets that he made a monster and deeply feels guilty that it is in pain of reliving

Explanation:

8 0
3 years ago
BIE, but plz help me on this ASAP!!! GIVING A BRAINLIEST... For this activity, imagine that you have been asked to teach a frien
WITCHER [35]

Answer:

DM me I have an answer set up but it won't let me here because it's "too long" hope to here back from you! (sorry about this Brainly has been acting up on me lately!!!!!)

Explanation:

3 0
3 years ago
Suzanne is following a fad diet. She has started to experience low energy during her workouts, and on a recent trip to the docto
Nastasia [14]

Answer:

Hi mate....

Explanation:

This is ur answer....

<em>-</em><em>-</em><em>></em><em> </em><em>Suzanne just facing low carbohydrates</em>....

hope it helps you,

mark me as the brainliest pls....

Follow me!

5 0
2 years ago
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