1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nadusha1986 [10]
1 year ago
12

Let R(ABCDE) be a relation in Boyce-Codd Normal Form (BCNF). If AC is the only key for R, identify each of these FD's from the f

ollowing list. Answer Yes or No and MUST explain your answer to receive points
Mathematics
1 answer:
Goshia [24]1 year ago
6 0

Given that R(ABCDE) is in Boyce-Codd normal form.

And AB is the only key for R.

Definition

A relational nontrivial Schema R is in BCNF if FD (X-A) holds in R, Super key of R. whenever then X is

a

Given that AB is the only key for R.

ABC E (Yes).

check if ABC is a Super key. AB is a key, ABC is A B C E is in BONE a super key.

2) ACE B

(NO). no Check if ACE As there is ACE is not a Super key? AB in Super key. ACE.

ACE B

is

Boyce-Codd Normal Form not in BENE (NO)

3) ACDE → B           (NO)

check if is a super key. ACDE

As ACDE there is not any AB Tn ACDE. a super key.

ACDEB is not in BCNF.

4) BS → C → (NO)

As there is no AB in BC ~. B(→ not in BCNF

BC is not a super key.

5) ABDE (Yes).

Since AB is a key.

ABO TS a super key.

.. ABDE → E is in BCNF

Let R(ABCDE) be a relation in Boyce-Codd Normal Form (BCNF). If AB is the only key for R, identify each of these FDs from the following list. Answer Yes or No and explain your answer to receive points.

1. ABC E

2. ACE B

3. ACDE B

4. BC C

5. ABD E

Learn more about Boyce-Codd Normal Form at

brainly.com/question/14299832

#SPJ4

You might be interested in
At which step did Fatu make an error, if at all?
Elza [17]

Answer:

Step 3

Step-by-step explanation:

7 0
3 years ago
Which one is better.
Firlakuza [10]

Answer:

pick 1

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
A family worked all day building a sandcastle on the beach. As they were building the castle they recorded the number of pails o
LiRa [457]

Answer:

15708 cubic inches

Step-by-step explanation:

The formula for a cylandir is V=πr^2h, substitute in your known factors and multiply by 20 for the 20 pails used and you get your answer.

5 0
2 years ago
A circle is shown. Secant X Z and tangent W Z intersect at point Z outside of the circle. Secant X Z goes through the center of
andriy [413]

Answer:

16

Step-by-step explanation:

7 0
3 years ago
Peaches are being sold for $2 per pound.The customer created a model to represent the total cost of peaches bought. If x represe
RUDIKE [14]
The answer is D The value of X can be any real number greater than or equal to 0 but the value of Y must be an interger greater than or equal to 0.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Derrick's garden is 18 1/2 feet long. He plants 3/8 of a foot apart. How many bulbs can Derrick plant in one row?
    14·2 answers
  • Is 13/16 greater than 7/8
    6·2 answers
  • Expand and simplify 5(2x-1) + 2(3x-6)
    6·1 answer
  • A recipe requires 3 1/2 cups of milk. Sam put in 1 3/4 cups and emptied the container. How much more milk does she need to put i
    9·2 answers
  • Write the equation of a line with a slope of −1 and a y-intercept of −6. (2 points)
    9·1 answer
  • When Lucas goes to school, he passes two traffic lights. The probability of showing red is 70% and 80%. How likely is it that at
    10·1 answer
  • Is 92 fluid ounces greater than 8 pints
    15·2 answers
  • The sum of twice a number and 4 times another number is 4. The difference of the numbers is 5. Find the numbers(help a sis out)
    15·1 answer
  • What is the circumference of the circle is 10 cm , to the nearest tenth of a centimeter
    13·1 answer
  • Bob is on his way home in his car. His drive is 16 miles long. He has finished one-fourth of the drive so far. How far has he dr
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!