AC→D, AB→C, AB→D, AB→E

Q: QUESTION 6 There will be three tables after converting the following conceptual diagram into the…

A: 6)  Answer :-- False It will converted into two table table A with two fields named field1 and…

Q: Question 1 Suppose you are given a relation R = (A, B, C, D, E) with the following functional…

A:

Q: Consider the relation r(A,B ) with the following instance of r. Which of the functional dependencies…

A: Rules to check valid functional dependency from   α -> β   Check if all the values of α are…

Q: 4D. The relation encoded by the matrix below is (select all that apply). [1 0 0 1 0 0 0 0 1 a…

A: A function is a relation or a mechanism in which every element x of any set X (domain of the…

Q: 3. Disprove the following rule: {B > CD, AB → E, E → C} |= {AE → CD} To disprove a rule, construct a…

A:

Q: Consider the following statements: (1) We can check if a functional dependency holds by examining a…

A: A functional dependency is a relationship between two attributes, typically between the PK and other…

Q: Given the relations CLASS(ClassID, Cycle, T'eachinghours) and STUDENT(StudentID, ClassID, StudName).…

A: Concept used:- master child relationship using primary key and foreign key.

Q: Given a relation R(P ,Q ,R ,S, T, U,V,W, X,Y)   and functional dependency set FD =…

A: Given a relation R(P ,Q ,R ,S, T, U,V,W, X,Y)   and functional dependency set FD =…

Q: Give an example of a relation schema R and a set of dependencies such that R is in BCNF but is not…

A: Answer: The relation schema R = (A, B, C, D, E) and the set of dependenciesA →→ BCB →→ CDE →→…

Q: 1. Given each relation write down the properties that the relation has. If the relation does not…

A: Below is the answer with explanation:

Q: Given the following relation schema R(B, N, O, A, T, C) and the set of functional dependencies F =…

A: F = {C-->OT, O-->AC, CN-->B, CB-->A, B-->N}: R(B, N, O, A, T, C)

Q: Give an example of how one non-key property depends on another non-key attribute to function?

A: I have answered this question in step 2.

Q: Given the relations CLASS(ClassID, Cycle, Teachinghours) and STUDENT(StudentID, ClassID, StudName).…

A: Answer:- Option-(A)-A class must have at least a student.

Q: 1. Given a relation model R, where U = {A, B, C, D, E}, F = {A->BC, C->D, BC->E, E->A}. The…

A: Note:- Please send the question once again if you wish to answer another question, as set out in the…

Q: There are four options for mapping specialization/generalization from an EER to a relational schema.…

A: According to the information given:- We have to follow EER model and apply four option to map…

Q: Show that AB→C does not logically imply A→C, norB→C.HINT: Write a relation instance that satisfies…

A: Functional Dependency : Functional dependency is a relationship that exists when one attribute…

Q: Problem 1 Convert the following relation to 2NF, and then to 3NF. Show both conversions. (h, n, c,…

A: In this question, first, we find the 2NF. In 2NF, for relations where the primary key contains…

Q: Suppose you have a Relation that has an atomic Primary Key and noRepeating Groups. All non-key…

A: According to the details provided about the relation, the relation is in 2NF. This relation has to…

Q: Assume we have two relations R(A,B) and S(B,C). All three attributes (A, B, and C) are integer…

A: Given:

Q: Consider a relation with schema R(A,B,C,D,E,F,G). Choose the key for the relation for the following…

A: According to the question we need to consider a relationship with schema R(A, B, C, D, E, F, G).…

Q: . Consider the relation R, which has attributes that hold schedules of courses and sections at a…

A: Let us first of all make use the following shorthand notation: C = the CourseNo, SN = the SecNo, OD…

Q: Functional Dependencies and Normalization Exercise 1: Consider the following relation:…

A: Question: Functional Dependencies and Normalization Exercise 1: Consider the following relation:…

Q: Given the relation R(A, B, C, D, E, F), the following functional dependencies exist: B --> C, D D…

A: Given : R(A, B, C, D, E, F) B --> C, DD --> F

Q: Given the following relation R and its functional dependencies: R(workerNumber, repairNumber,…

A: From the given R(workerNumber, repairNumber, workerName, machineNumber, spentTime, repairDate,…

Q: 1. Consider the following relation: BIKE_SALE(Bike_ID, Salesperson_ID, Date_Sold , Sale_Commission,…

A: The candidate's keys from this relation: { Bike_ID, Salesperson_ID} as the closure of these…

Q: Problem 1 Convert the following relation to 2NF, and then to 3NF. Show both conversions. (h, n, c,…

A: 2NF: A relation is in 2NF if it is already in 1NF and all functional dependencies should be full…

Q: Consider a relation schema R = {A, B, C, D, E, F, G} with the following set of %3D functional…

A: In this question, we have a relation schema R along with its functional dependencies F. Also given 4…

Q: g set of five functional dependencies which hold on R: A → B A C BD → E EC → A E →G ompute the…

A: Closure (CE) = { C, E, G, A, B} Closure (AD) ={A, D, B, C, E, G}

Q: Consider a relation consisting of the attributes A, B, C, with the following set of functional…

A:

Q: 1. What technique is used to model the situation that Student may have multiple addresses? A)…

A: The answer is option B - Weak entitiesBecause the addresses belong to that student and cannot exist…

Q: Consider the relation R with the following functional dependencies: R(P,Q, R, D, E, F) FD = {P >…

A: Answer: Option (d) PEF, QFR

Q: Suppose RR is a relation with attributes A1,A2,…,AnA1,A2,…,An. How many superkeys will RR have if…

A: Given RR is a relation with attributes A1,A2,…,An  a) The only candidate key is A1 b) The only…

Q: Consider the following relation that involves student data: RADE (ClassName, Section, Term, Grade,…

A: Primary key for the given relation is (ClassName, Section, Term, StudentID)  Here the functional…

Q: Consider the universal relation R (A, B, C, D, E, F, G} and the set %3! of functional dependencies F…

A: The Relation given is : R = { A, B, C,D ,E, F, G} And the functional dependencies are: B,C --> A…

Q: Write a relational algebra expression that is equivalent to the following SQL statement: SELECT…

A: Given SQL statement is, SELECT AVG(SALARY) , COUNT(*) FROM EMPLOYEE WHERE  GENDER = 'M' GROUP BY…

Q: Q2: Given relation R with attributes (A, B, C, D, E, F). Give all the keys of R if the functional…

A: Given relation R(A, B, C, D, E, F)   Functional Dependencies: AB → C,  CD → E,  E → F   A, B, D do…

Q: Consider the relation schema R=VWXYZ, with the set of functional dependencies F = {VW->XY, V->X,…

A:

Q: First determine which normal form (1NF, 2NF, 3NF or BCNF) the above relation is, and why.…

A: Here we identify, which normal form: figure 2: here explanation why it is not in BCNF,3NF and 2NF.…

Q: Given that a student must have a class. If class has as primary key ClassID, what foreign key…

A: Answer D) ClassID

Q: Defined the relational algebra operations as follows: SELECT (p, R) is equivalent to σp(R)…

A: we have to write a SQL statement for the given relational algebra. PROJECT (<STUD_ID,…

Q: ideas 9. Suppose relation R(A,B,CD) has the following functional dependencies 1-B, B- C, BC A, A D,…

A: The answer is

Q: a) A computer program consists of five modules M1, M2, M3, M4, and M5. A relation R on the set of…

A: Below is the answer to above question. I hope this will helpful.

Q: List all nontrivial functional dependencies satisfied by the relation of Figure 7.18.

A: NON-TRIVIAL FUNCTIONAL DEPENDENCIES: Functional dependency refers the concept in which one…

Q: QUESTION 9 A relation R(M, N, O, P, Q) is in 2NF and has the following functional dependencies: • MN…

A: Dear Student, As MN derives O and O derives P and also Q thus MN derives M,N,O,P,Q. Thus MN is a…

Q: Consider the following statements: (1) We can check if a functional dependency holds by examining a…

A: Ans: As per the following statements is: a) We can check if a functional dependency holds by…

Q: the above relation (with proper steps followed). b) Identify which normal form this relation is in

A: Given functional dependencies as, R(ABCDEF)AB->CD, CD->EF, BC->DEF, D->B, CE->F

Q: You are given the following set of functional dependencies for a relation R= (A, B,C,D,E,F), F= (AB…

A: A) The functional dependency are AB->C DC->AE E->F The key for the given relation is set of…

Q: Question 2 Composite relations can be thought of as composite functions. If S is a relation from set…

A: As per guidelines we can answer only one question at a time for answers of other question ask…

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.