Consider a schema R, a set F of functional dependencies on R, and two candidate keys (k1, k2) as follows: R = (X,Y,Z). F = {Y → Z,XZ → Y}. k1 = XZ. k2 =XY Is R in BCNF? Is R in 3NF? (a) R is in both BCNF and 3NF (b) R is in BCNF but not in 3NF (c) R is not in BCNF but in 3NF (d) R is in neither BCNF not 3NF

Q: Consider the schema R = (A, B, C, D, E, G) and the set F of functional dependencies:AB → CDADE →…

A: (a) We can observe that the right side part of functional dependencies that attributes are C, D, E G…

Q: Let a bus timetable be represented by a list of routes where each route is repre- sented by…

A: I Have answered this question in step 2.

Q: 7.21 Give a lossless decomposition into BCNF of schema R of Exercise 7.1. (see 7.1 below)  (7.1) :…

A: decompose the schema R = (A, B, C, D, E) into (A, B, C) (A, D, E).          Show that this…

Q: c) Consider the following relation R with the functional dependencies: AC B, AD E, AB C, E→F, BC A,…

A: Given functional dependencies, AC→BAD→EAB→CE→FBC→AB→D

Q: Consider a schema  R={A,B,C,D,E} and the following set of functional dependencies: {AB-> C,…

A: To find whether the relation is in BCNF or not, it must fulfill all the conditions given…

Q: Find a minimal cover in a standard form for the relation schema R(A, B,C, D, E, F, G, H) with the…

A: A minimal cover or canonical cover means a minimum set of functional dependencies. A canonical cover…

Q: Propose a relation schema for storing the access rights associated with user groups in a distributed…

A: Distributed DBMS A distributed database is a set of interconnected databases that is distributed…

Q: Consider the schema R = (A, B, C, D, E, G) and the set F of functional dependencies:AB → CDADE →…

A: Given schema R = (A,B,C,D,E,G) and set of FD's are             F =  AB --> CD…

Q: Consider the following database schema for University Library database. A student can borrow many…

A: Select ISBN,Title,Author from BOOK where title like '%Database%' order by ISBN Desc;

Q: Suppose the database contains n RnaSequence objects, in a random order. What is the average case…

A: Lets discuss the solution in the next steps

Q: Consider a schema R, a set F of functional dependencies on R, and two candidate keys (k1, k2) as…

A: Given information: - A schema R, a set of FDs F and the two candidate keys (k1, k2) are shown below:…

Q: Consider the schema R = (A, B, C, D, E, G) and the set F of functional dependencies:AB → CDADE →…

A: Given schema R = (A,B,C,D,E,G) and set of FD's are,             F =  AB --> CD…

Q: Consider R(A,B,C,D) and Functional dependencies A -> B, B -> C, C-> D, D -> B. Following…

A: Given:

Q: Crash consistency   Explain two specific scenarios of problems that can happen if the system…

A: Given: Crash consistency   Explain two specific scenarios of problems that can happen if the system…

Q: Consider the schema R = (A, B, C, D, E, G,H) and the set F of functional dependencies:AB → CDD → CDE…

A: Given:-  schema R = (A, B, C, D, E, G,H) set F of functional dependencies:AB → CDD → CDE → BDEH →…

Q: Consider a schema R and a set F of functional dependencies as follows: R= (A,B,C,D,E,G). F = {A →…

A: First of  all , let’s understand what is super key.      Super key : Super key can be defined as  an…

Q: serializability

A: Version-vector Scheme A version vector is a method for monitoring data changes in a distributed…

Q: Let's suppose, a relation R=(A, B, C, D, E. H) with a set of functional dependencies F: (AE->BC, B…

A: Functional dependency is a DBMS concept . In this attributes of relations  are dependent on each…

Q: is an ordered *.collection of objects relation set non of them O

A: According the Question below the Solution:

Q: Consider thne universal relation R (AB. E F, G, H, I. JJ and the set of functional dependencies F =…

A: A functional dependency x->y is said to be partial functional dependency if X is part of key or…

Q: Consider a relational scheme R(A,B,C,D,E,H)R(A,B,C,D,E,H) and functional dependencies…

A: Given relational schema is R(A,B,C,D,E,H) Functional dependencies A→B,BC→D,E→C,D→A Candidate key…

Q: Consider a schema R = {A,B,C,D,E}and the following set of functional dependencies: {AD->B,…

A: If there is any relation R and we have to check whether the relation is in Boyce–Codd Normal Form…

Q: a) Give an interpretation that is a model of A. You must mapp and q to different relations. b) Show…

A: Predicate Quantifiers is used in system modelling & Design

Q: Consider the following database schema for a library. Book (BookID:int, BookTitle:string(unique),…

A: No, It Is Not Possible to have a Borrowing-Record with an unknown CustomerCPR.

Q: Consider a schema R = (A, B, C, D, E). Assume that the following set F of functional dependencies…

A: (CD)+ is CD closure which gives the set of all regular Functional Dependencies that can be derived…

Q: Write a C program that would: - Let the users accept a relation. - Input options should be in…

A: The C language is a computer programming language which was developed to do system programming for…

Q: Is it feasible to have two clustering indices on the same relation that are used for distinct search…

A: An index offers link to data with a specified value. Indices make search  faster. A clustering index…

Q: Let R1, R2,…, Rn be a decomposition of schema U. Let u(U) be a relation, andlet ri = ΠRI(u). Show…

A: Given,  R1, R2,…, Rn be a decomposition of schema U u(U) is a relation ri = ΠRI

Q: Suppose there are two relationsr and s, such that the foreign key B of r references the primary key…

A: Consider the given two relations r and s and their on delete cascade constraint as the primary key…

Q: Using the functional dependencies of Exercise 7.6, compute the canonicalcover Fc.

A: Using the functional dependencies of Exercise 7.6, compute the canonicalcover Fc. Hence I have found…

Q: Given: Relation R = {(a,a), (a.b), (b,a). (b,b). (c,c)} and Set S = {a, b, c} Complete Relation R…

A: Find the answer given as below :

Q: The next best alternate after BCNF is 3NF.  We can say that this schema is 3NF but not BCNF.  Match…

A: The answer has given

Q: Consider a schema R = {A,B,C,D,E}and the following set of functional dependencies: {AB → C,C → D,D →…

A: To find: To find whether the given function is Boyce-Codd normal form or not.

Q: Implement in Python / Java

A: Lossless JOIN property allows to create  a table of relations and insert values in the form of bij…

Q: Consider a table T in a relational database with a key field K. A B-tree of order p is used as an…

A: Introduction:in B-Tree Given,K = 10 byteBlock Size = 512 bytesPD = 8 bytesPB = 5 bytesTo fit each…

Q: Distinguish between the main key-based definitions of 2NF and 3NF and the generic definitions. Give…

A: 2NF: This stipulates that a relation in first normal form should not have any non-prime…

Q: Suppose that we decompose the schema R = (A, B, C, D, E) into (A, B, C) (A, D, E). Show that this…

A: The given functional dependencies are as follows. A → BCCD → EB → DE → A   Consider the decomposed…

Q: Consider a relational scheme R(A,B,C,D,E,H) and functional dependencies A→B,BC→D,E→C,D→A. Find all…

A: In the functional dependencies above E, H are not present at the right hand side hence a candidate…

Q: Consider the schema R = (A, B, C, D, E, G) and the set F of functional dependencies:AB → CDADE →…

A: Given schema is:  R = (A,B,C,D,E,G) whereas set of functional dependencies are: Candidate Key: The…

Q: Consider the relation R(A,B,C) with the functional dependencies: B A, CA, and AB C. a) Show the…

A: Below i have answered 1 st question only:

Q: 1. Consider the relation R on the set (a,b.c,d,e,f] which is defined as follows: R-[(a,a), (a,b).…

A: Here in this question we have given a set and a relation is also defined on this set.and we have…

Q: Consider a relational scheme R(A,B,C,D,E,H)R(A,B,C,D,E,H) and functional dependencies…

A: The Answer is

Q: Consider a relation R(A, B, C, D, E, F), with FDs AB → C , BC → D, D → E, BE → F and DF → C. 1. Is R…

A: R is not in 2NF  so it is not in BCNF 3. primary key is AB, superkey of R that is not minimal key is…

Q: Given the schema S=  , where F represents the following dependencies: AB→D A→D E→B B→H H→C E→C…

A: A functional dependency which refers to the relationship between two attributes and typically which…

Q: Let A is a set defined as A= {1,2,3,4} and R is a relation on A, R is: * O neither equivalent nor…

A: Let A is a set defined as A= (1,2,3,4) and R is a relation onA, Ris: * neither equivalent nor…

Q: Consider replacing F by an alternative set of functional dependencies G: AP-> IT I -> ATP Is the…

A: The Answer is in step-2.

Q: Consider the schema R = (A, B, C, D, E, G, H) and the set F of functional dependencies:AB → CDD →…

A: 3NF decomposition: Any relation is said to be in 3NF if it follows following characteristics: The…

Q: Suppose that R1 and R2 are symmetric relations on a set A. a) Is R1 U R2 also symmetric? Is R1 ∩ R2…

A:

Q: Suppose R(A,B,C,D,E) and we have the functional dependencies F= { A->C, C->D, B->C, DE->C, CE->A }

A: Functional Dependency A functional dependency A->B in a relation holds if two tuples having same…

Intermediate SQL Concepts

A query is a request for data or information from one or more database tables. This information could be presented in the form of pictorials, graphs, or complicated findings which helps in easy interpretation. Structured Query Language (SQL) is the most widely used programming language for retrieving and organizing data from relational databases. Collection of tables with rows and columns is referred to as a database. SQL is the language of databases. It makes it easier to extract specific data from databases, which can then be used for analysis.