Let R(A, B, C, D, E) be a relation wit FDs F = {AB->C, CD->E, E->B,...

Question

Question

Let R(A, B, C, D, E) be a relation wit FDs F = {AB->C, CD->E, E->B, CE->A}....

Question 4 Not yet answered Marked out of 2.00 P Flag question Let R(A,B,C,D,E) be a relation with FDs F = {AB-C, CD-E, E-B,

engineering Computer-Science

Answer 1

Answer #1

Answer 2

Similar Homework Help Questions

Let R(A,B,C,D,E) be a relation with FDs F = {AB-C, CD-E, E-B, CE-A} Consider an instance...

Let R(A,B,C,D,E) be a relation with FDs F = {AB-C, CD-E, E-B, CE-A} Consider an instance of this relation that only contains the tuple (1, 1, 2, 2, 3). Which of the following tuples can be inserted into this relation without violating the FD's? (2 points) Select one: O (0, 1, 2, 4,3) (1,1,2,2,4) (1.2.2, 2, 3) o (1,1,3,2,3) All of the above can be inserted. None of the above can be inserted.
Let R(A,B,C,D,E) be a relation with FDs F = {AB-CD, A-E, C-D, DE} The decomposition of...

Let R(A,B,C,D,E) be a relation with FDs F = {AB-CD, A-E, C-D, DE} The decomposition of R into R1(A, B, C), R2(B, C, D) and R3(C, D, E) is (2 Points) Select one: Lossy and Dependency Preserving. Lossless and Not Dependency Preserving. Lossy and Not Dependency Preserving. Lossless and Dependency Preserving.
Let R(A,B,C,D,E) be a relation with FDs F = {AB-CD, A-E, C-D, D-E} The decomposition of...

Let R(A,B,C,D,E) be a relation with FDs F = {AB-CD, A-E, C-D, D-E} The decomposition of Rinto R1(A, B, C), R2(B, C, D) and R3(C, D, E) is 2 Points) Select one: Lossless and Dependency Preserving. Lossy and Not Dependency Preserving. Lossless and Not Dependency Preserving. Lossy and Dependency Preserving.

Let R(A,B,C,D,E) be a relation with FDs F = {AB-CD, A-E, C-D, D-E} The decomposition of...

Let R(A,B,C,D,E) be a relation with FDs F = {AB-CD, A-E, C-D, D-E} The decomposition of Rinto R1(A, B, C), R2(B, C, D) and R3(C, D, E) is 2 Points) Select one: Lossless and Dependency Preserving. Lossy and Not Dependency Preserving. Lossless and Not Dependency Preserving. Lossy and Dependency Preserving.
Let R(A,B,C,D,E) be a relation with FDs F = {AB-C, CD-E, E–B} (2 Points) Select one:...

Let R(A,B,C,D,E) be a relation with FDs F = {AB-C, CD-E, E–B} (2 Points) Select one: O Ris in 3NF but not in BCNF. O Ris not in 3NF but in BCNF. O Ris in 3NF and in BCNF. R is not in 3NF and not in BCNF.
For the relation R(A,B,C,D,E) with the following FDs: A → B, C → D, AB →...

For the relation R(A,B,C,D,E) with the following FDs: A → B, C → D, AB → C, BC → A 1. List all non-trivial FDs following from the above. (2 marks) 2. Generate all possible keys for R. (2 marks) 3. Check whether R is in BCNF. If it is in BCNF, explain the criteria you used. If it is not in BCNF, convert it into BCNF, showing the new relations and their FDs. (5 marks)

Let R(A, B, C, D) be a relation with FDs F= {A->B, A->C, C->A, B->C, ABC->D}...

Let R(A, B, C, D) be a relation with FDs F= {A->B, A->C, C->A, B->C, ABC->D} which of the statement is correct? Question 2 Not yet answered Marked out of 2.00 P Flag question Let R(A,B,C,D) be a relation with FDs F = {AL-B, AC, CA, B-C, ABC-D} Which of the following statements is correct ? (2 Points) Select one: O G = {A--B, BC, C-A, AC-D} is a canonical cover of F OH = {A-C, C+A, B-C, B-D} is...
5. [5 points] Let relation R (A, B, C, D, E) satisfy the following functional dependencies:...

5. [5 points] Let relation R (A, B, C, D, E) satisfy the following functional dependencies: AB → C BC → D CD → E DE → A AE → B Which one of the following FDs is also guaranteed to be satisfied by R? A. B. BCD → A A-B D. CE → B
For the following relation schema and set of FD's R(A,B,C,D) with FD's AB->C, B->D, CD->...

For the following relation schema and set of FD's R(A,B,C,D) with FD's AB->C, B->D, CD->A, AD->B Indicate the BCNF violations, and decompose the relations into relations that are in BCNF.

Given relation R(A, B, C, D, E, F), give (i) the key(s) of R and (ii)...

Given relation R(A, B, C, D, E, F), give (i) the key(s) of R and (ii) the normal form of R if the FDs are: (d) AB -> C, CD -> EF (e) AB -> CD, D -> EF, C -> AB. (f) ABC -> D, ABC -> E, ABC -> F.