Consider the relations Students, Faculty, Courses, Rooms, Enrolled, Teaches, and MeetsIn defined below.
Q: how to graphically identify an entity, a the cardinality (o,N), a weak relation ship, and a strong…
A: Graphically identifying an entity in a Crow’s Foot notation: In ER model, the term entity refers to…
Q: What is the strength of a relationship? Give an example of each of the degree of association given…
A: Answer : The strength of relationship between two entities in the ER diagram is based on the primary…
Q: For each entity, there needs to be an indication of whether it is one-to-one, one-to-many or…
A: The answer is
Q: Provide examples of relations that could have more than one candidate key.
A: Candidate key A candidate key is recognized as a "set of attributes" (or fields) with the ability…
Q: Consider the below given ER diagram: El E2 E3 RE The minimum number of relations required for the…
A: Introduction :We have given an ER diagram , we have to calculate the minimum numberof relations…
Q: Q1 / answer the following: 1- The difference between relational data model and entity- relationship…
A: 1. In Relational data model , the relationship between entity is represented using table. While…
Q: Suppose the advisor relationship set were one-to-one. What extra constraints are required on the…
A: GIVEN: Suppose the advisor relationship set was one-to-one. What extra constraints are required on…
Q: Using the assumptions you stated in your answer to question 2.32, what are the determinants of this…
A: Given: Using the assumptions you stated in your answer to question 2.32, what are the determinants…
Q: Consider two relations Order and Product with the schema OrderDid, Odate, Pid, qty) and Product…
A: The answer is
Q: Given the basic ER and relational models, which of the following is INCORRECT? A An attribute of an…
A: Option (c) is the INCORRECT option
Q: Consider each of the takes and teaches relations as a fact table; they do not have an explicit…
A: What is star schema? Star Schema in data warehouse, in which the center of the star can have one…
Q: Regards to the diagram below (figure 4.12), answer the following questions using the multiple-choice…
A: The answers for the following question can be derived from the diagram given. How is of_type…
Q: In a one-one relationship, the primary key of one entity acts as foreign key on which side? must be…
A: Primary Key :- It is the key in table that is unique and not null in any table like emploee_id is…
Q: Consider the below given ER diagram: El RI R2 RS R4 R3 The minimum mumber of relations required to…
A: Introduction :Given , An ER diagramWe have to find the number of relations required to represent the…
Q: Extract and write down the DB Schema for the following E-R Diagram. You need to write the name,…
A: Terminology used in this E-R diagram:
Q: Based on the set of 3NF relations derived in (b), draw a complete entity relationship diagram (ERD)…
A: Employee Record ( Name, Emp Number, Address, DOB) Course Attended ( Number, Description, Location,…
Q: Relationship Type? (M:1, 1:1 etc) and Relationship trength? .What are the Cardinalities in the…
A: Q)1)Relationship Type: One-to-One Relationship One-to-Many or Many-to-One Relationship Many-to-Many…
Q: following relational schema, representing five relations describing shopping transactions and…
A: The relational schema defines the relation between entities and attributes. The entities in a…
Q: 'What's an unnormalized relationship? Is it a relationship according to the term relation…
A: Unnormalized relationship
Q: Which one is correct Consider the following ER diagram depicting the relationship of an employee and…
A: To Do: To choose the correct option.
Q: Describe how the relationship (1:M) of an E-R diagram is transformed into relations
A: Relations:: The entity relationship (ER) information model has existed for over thirty five years.…
Q: ) i). Name and explain the type of relationship the relations in figure 2 depict. ii). Using…
A: A) There is a foreign key constraint relationship between Student and Room relations
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: Assume that the advisor relationship set is a one-to-one match. To guarantee that the one-to-one…
A: given: One record in one table may be linked to one or more records in another table in a…
Q: Question 1 Map the following ER diagram into a clear relation schema.
A: Solution-
Q: PAΥMENΤ Paymentld InstitutionName AcctHolderName(First, Last) {Payee} PaymentType "С" "В" CARD…
A: ENTITIES As per the given ERD, the entities are as follows. PAYMENT CARD BANK_ACCOUNT PRIMARY KEY…
Q: lame the THREE (3) components that are considered to be part of any data Comment on the extent to…
A: Lets see the solution.
Q: Summarize six important properties of relations
A: Given: Summarize six important properties of relations
Q: Consider the following schema for a student relation. Student {Student ID, Last Name, First Name,…
A: Answer: our instruction is answer the first three part from the first part and I have given answered…
Q: 4 What is the type of the relationship in the following figure? * Employee Organization Association…
A: To Do: To recognize the relation.
Q: ✦ Converting schema model from ER model, an additional table is made in case of many to many…
A: ER diagram is converted into Relational model in which each entity is converted into a table and all…
Q: Assume you have a one-on-one relationship with an advisor. What extra constraints must the relation…
A: The number of elements in a particular set is referred to as cardinality in mathematics. Cardinality…
Q: Staff_code CountryCode Staff_name COUNTRY STAFF belongs Degree Country_name Specialization Continent…
A: Sl.no Question Answer 1 Simple Attribute CountryCode, StafCode, StaffName, Specialization,…
Q: Whenever patients are seen for the first time, they complete a patient information form that asks…
A: The solution for the above given question is given below:
Q: Define the term relationship and give an example other than those used in this book.
A: Definition of relationship: A relationship is any connection between two types of entities. The…
Q: Transform the given ER model into a set of 3NF relations. Use the format shown below for relations.…
A: ENTITIES As per the given ERD, the entities are as follows. PAYMENT CARD BANK_ACCOUNT PRIMARY KEY…
Q: Multiplicity is the same as what concept for an ERD? a. Relationship b. Attribute c. Entity d.…
A: Please see the next step for solution
Q: Give an example of a ternary relationship (different from any example presented herein).
A: The university or college needs a record that which teacher teaches which subject in the college or…
Q: Make up a scenario from a subject/industry area of your choosing, and invent a single relation that…
A: Given question has asked to make up a scenario and show a single relation that has at least one…
Q: Part 3: Denormalization – Pick one of the three common relationship types that often give an…
A: DENORMALIZATION: denormalization, the opposite of normalization to increase the performance…
Q: Discuss the differences between a weak relationship and a strong relationship.
A: RELATIONSHIP: The relationship in context of database management system refers to various ways…
Q: What are the requirements that two relations must satisfy in order to be considered union…
A: Union compatibility: In a database, relations are a set of tuples. Hence, set of operation can be…
Q: Given the following schema. Primary keys are underlined and highlighted in yellow and foreign keys…
A: 1) SELECT AVG(Donation_Amount) as Amount FROM Donor D, Donation_Record DRWHERE D.Donor_id = 3329 AND…
Q: Consider a relation X with six attributes WYSMFE where WS is a composite primary key for X. Assume X…
A:
Q: In Figure 1, what type of relationship do the relations depict? Student Student ID Room Room ID O…
A:
Q: a) Consider the given schema. Instructor(id, name, dept, address, age, phn_number) Student(s id,…
A: here we have given the hand written images of mapping cardinalities and normalized data upto 3nf
Q: Give a Relational Model that corresponds to the Entity-Relationship Diagram given below: address M…
A:
Q: Question 1: Normalization Consider a relation X with six attributes WYSMFE where WS is a…
A: 1.
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- 1. Consider the following relations:Student (snum: integer, sname: string, major: string, level: string, age: integer)Class (name: string, meets at: string, room: string, fid: integer)Enrolled (snum: integer, cname: string)Faculty (fid: integer, fname: string, deptid: integer)The meaning of these relations is straightforward; for example, Enrolled has onerecord per student-class pair such that the student is enrolled in the class. Level is atwo character code with 4 different values (example: Junior: A Level etc)Write the following queries in SQL. No duplicates should be printed in any of theanswers.i. Find the names of all Juniors (level = A Level) who are enrolled in a classtaught by Prof. Kwizeraii. ii. Find the names of all classes that either meet in room R128 or have five ormore Students enrolled.iii. Find the names of all students who are enrolled in two classes that meet atthe same time.Consider the following relations for a university: Student (sid: integer, sname: string(100 chars), GPA: real, dateOfBirth: date, Did: integer, FirstYear: integer)Department (did: integer, dname: string(30 chars), capacity: integer)Course (cid: integer, cname: string(50 chars), credit: integer)Enroll (studentID: integer, courseID: integer, departmentID: integer, enrollmentDate: date, finalGrade: real) studentID, courseID, and departmentID in Enroll are foreign keys referencing the primary keys of the student, course, and department relations, respectively. Did in Student is a foreign key referencing the primary key of the department relation. 1) For each student with GPA between 2.5 (included) and 3.5 (included), display the student’s name, GPA,and his/her department ID. Sort the results by the students’ IDs in descending order. 2) For each student who joined the Computer Science department between 2018 (included) and 2020(included), display the…Q4: Design a database for an airline. The database must keep track of customers and their reservations, flights and their status, seat assignments on individual flights, and the schedule and routing of future flights. Your design should include a set of relational schemas, and a list of constraints, including primary-key and foreign-key constraints. Please note that an E-R diagram is not required.
- Relational Model (Logical and Physical Schema Development) The conceptual model developed in phase 2 will be transformed into a logical and physical schema using the relational data model. The outcome of this transformation will be a relational schema. The schema should have the following components: Set of required relations All the integrity constraints Submission and Evaluation: A report consisting of the problem statement, ER diagram, relational schema And implement the database using SQL should include: All the tables properly defined /created All constraints properly defined For each table, few instances of data should be entered. Producer Pharmacy medicines The pharmacy contains employees, certain medicines customers and patients Date Name Customers age pharmacy sex employees Commercial Record Address Location Salary Name//Last three parts not answered before You are working with a database that stores information about suppliers, parts and projects. The Supply relation records instances of a Supplier supplying a Part for a Project. The schema for the database used in this question is as follows: ( primary keys are shown underlined, foreign keys in bold). SUPPLIER (SNo, SupplierName, City) PART (PNo, PartName, Weight) PROJECT (JobNo, JobName, StartYear, Country) SUPPLY (SNo, PNo, JobNo, Quantity) Provide relational algebra (NOT SQL) queries to find the following information. NOTE: You can use the symbols s, P, etc or the words ‘PROJECT’, ‘RESTRICT’ etc . do not need to try to make efficient queries – just correct ones. Where you use a join, always show the join condition. List the quantity of parts supplied on JobNo 4745. List the weight of the Part named “Left-handed screwdriver”. List the Project name and Part name of any Parts where fewer than 500 of the part has been supplied to a particular…QUESTION 7 Consider the following database schema for University Library database. A student can borrow many books and a given book can be borrowed by any student if it is available in the library. For each borrowing, the borrowing and return dates are registered in the database. Student (SID: long, CPR:long (unique), Name:string, tel:number, major:String, gender:Character (F'or M'}) Book (ISEN:long. Title:string (unique), Author.string) BorrowedItems(STSID:long, booklSBN:long, serialNo.int (unique), BorrowingDate:date, ReturnDate:date) Write SQL statements to: 1. List ISBN, Title, Author of all books that include the word 'Database' in their titles in a descending order of ISBN. 2. List SID, Name, and Major of all female students doing major in CS' and their name starts with 'S'.
- Instructions: Create a complete ERD in Crow's Foot notation that can be implemented in the relational model using the descriptions below. The attributes required: Activity's ID, Activity's Title, Activity's description, Child's ID, Child's firstname and lastname, Child's Birthday, Parent's ID, Parent's number, Parent's address. The business rules are: An activity may or may not have a child signed up An activity may have many children signed up A child must have an activity A child may have many activities A child must have a parent A parent must have a child A child may have many parents A parent may have many children To submit: Write your answer in a clean sheet of paper and upload a picture of it to dropboxDATABASE SYSTEM A relation R is given which is R(A,B,C,D,E). It has the following functional dependencies: BC -> ADE , D -> B. Answer the following based on this information. Which normal forms does this relation satisfy? Which type of dependencies does this relation violate? Normalize the relationship so that it decomposes to 3NF.What is a Attribute interpolation?
- Computer Science Relational Model (Logical and Physical Schema Development) The conceptual model developed in phase 2 will be transformed into a logical and physical schema using the relational data model. The outcome of this transformation will be a relational schema. The schema should have the following components: Set of required relations All the integrity constraints Submission and Evaluation: A report consisting of the problem statement, ER diagram, relational schema And implement the database using SQL should include: All the tables properly defined /created All constraints properly defined For each table, few instances of data should be entered.Consider the following relation: CAR_SALE (Car_id, Option_type, Option_listprice, Sale_date, Option_discounted price). This relation refers to options installed in cars (e.g., cruise control) that were sold at a dealership, and the list and discounted prices of the options. If Carl D → Sale_date and Option_type → Option_listprice and {Carl D, Option_type} → Option_discountedprice, a) Argue using the generalized definition of the 3NF that this relation is not in 3NF. b) Argue from your knowledge of 2NF, why it is not even in 2NF.If you sell a house more than once, it is treated as different "property" for each sale. Draw an entity-relationship diagram and write a database design outline. Q2. Law Office: You are trying to automate the records for your uncle's law firm. Multiple attorneys work for the firm, and for each of them you want to store their first name, last name, date hired, hourly billing rate, and date promoted to partner (blank if the attorney is not a partner). Each attorney has multiple cases, which is identified by a unique "docket number". Each case has a name and description, is worked on by only one attorney, and involves a single client. For each client, you want to store a first name, last name, middle name, phone number, address, city, state, and zip code (assume you do not have a zip-code table). Finally, you want to keep track of the billable hours spent on each case. For a single case, this comprises information that looks like Hours Billed Date 2/24/2005 Description Prepare brief…