Suppose you are given a database relation R with single-valued atomic attributes (A, B, C, D, E) and a set of functional dependencies F = {AB-C, AC→B, AE, B→D, BC→AE}(a) List all candidate keys for R. (6 points)(b) Name the strongest normal form that holds on R and explain. (4 points)(c) Decompose it into a collection of BCNF relations if it is not in BCNF. Show all steps. (6 points)For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).Open Sans,ari...10ptx² X2میP><[]<> † {;}Ка?لاک(+BIUSParagraph===由用EXE+ ŒP-|||ABCAП"" ΩIx用:0 WORDS POWERED BY TINY

To address the problems posed, let's go through each part step by step. ### (a) List all candidate…

Answered: Suppose you are given a database…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Consider a relational scheme R(A,B,C,D,E,H)R(A,B,C,D,E,H) and functional dependencies A→B,BC→D,E C,D AA B,BC→D,E C,D→A. Find all candidate keys of RR.
If we have a set of attributes as R: (W, X, Y, Z) and functional dependencies are: Z -> W Y -> XZ XW -> Y What is the candidate key(s)?
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A relation r(A, B, C) had multi-valued dependencies among all its attributes. It was decomposed for achieving a better database as follows r1(A, B) r2(B, C) r3(C, A) This is an example of what kind of normalization? BCNF 4NF OPJNF DKN
1) Why may we need to decompose relations in a database system? Define lossy and lossless decompositions. When we decompose a relation, ideally, we would prefer to ensure two things. One is lossless decomposition. What is the other?
Consider relation R(A,B,C,D,E,F) with functional dependencies: {C,D,E} {B} (A,C,D] {F} {B,E,F] → [C] [B] [D] Which of the following is a key of R? O (A,D,E,F) O (A.C.D.E) O [CD] O [A.B.D.F]
Consider a relation schema R = {A, B, C, D, E} and its functional dependency set F = {A → B,CD → E,B →D,E → A}. Which ones of the following are not candidate keys for R? (a) A(b) BC(c) CD(d) D(e) E
Consider the relations section and takes. Give an example instance of these two relations, with three sections, each of which has five students. Give a file structure of these relations that uses multitable clustering.
4. (a) Why is normalization important in database design? Consider the universal relation R = {A, B, C, D, E, F, G, H, I, J} and the set of functional dependencies F = { AB → C, A → DE, B → F, F → GH, D → IJ }.What is the key for R? Decompose R into 2NF (Second Normal Form) and then 3NF (Third Normal Form) relations. (b) Consider a relation schema R = (X, Y, Z) on which the following functional dependencies hold: { XY → Z, Z → X }. Show that the schema R is not in BCNF (Boyce-Codd Normal Form) but it is in 3NF (Third Normal Form).

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