Q4. By giving an example, define the following terms: a. Coding: b. Relation and Relationship:
Q: Can the foreign key be extracted from another table that is not connected to it in entity…
A: Foreign keys are a part of table which are being sourced from some column in a different table.
Q: Consider the relation schemas R(A,B) and S(A,B). Suppose {A } is the key for R and also the key for…
A: Even though {A} is the key for both R and S, the union of R and S has the complete keyset, so here…
Q: B3. How many attributes and tuples are there in the Cartesian product of the above two relations?…
A: According to the information given we have to define the number of attributes and number of tuples.
Q: Show that if a relation has no attribute that is functionally determined by all the other…
A: Introduction Show that if a relation has no attribute that is functionally determined by all the…
Q: Database Map the Hotel ER diagram into relations. The outcome schema should have: - Relations -…
A: Given: The Hotel ER diagram :
Q: Discuss the concept that an attribute that is part of a composite primary key is also a candidate…
A: A candidate key is a single field or a composite expression that meets the requirements of a primary…
Q: How relation listening important?
A: The relationship that is built between people when they communicate is the focus of relational…
Q: A weak entity set depends on another entity set for all or part of its key. Select one: O a. False…
A: Since weak entity dont have its own primary key, it depends on another entity, and weak entity have…
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: Distinguish between Data Dictionary and Entity Relationship diagram. Give examples to illustrate…
A: According to the information given:- We have to distinguish between Data dictionary and entity…
Q: The following functional dependencies describe a relation that is in 2NF. Customer_ID, Store_ID→…
A: Rules of 2NF: Table must be in 1NF No non-prime attribute is dependent on the proper subset of any…
Q: Give an example of a surrogate key
A: In database design, it is a good practice to have a primary key for each table. There are two ways…
Q: example
A: Ternary relations:- When three entities are involved and taking part in a relationship then it is…
Q: Define the term degree of relationship. Give an example, other than one used in this text, of a…
A: Degree of relationship :-
Q: 1. Mapping a relationship that has a total participation, implies that the foreign key should be: a.…
A: SQL (Structured Query Language) is a standard programming language that used to manage relational…
Q: QUESTION 4 For the following collection of entities, give the assumptions concerning the…
A: Given entities: ORDER (order#, ordDate, cust#, cName ) ORDER_PART ( order#, part#, quantity ) PART…
Q: Question- Translate the following ER diagram into the appropriate relational schema(s):
A:
Q: How can we define relation? Identify the characteristics that make up a relation.
A: The table in the relational database or the relationships created between the same tables using…
Q: Question 1 Map the following ER diagram into a clear relation schema.
A: Solution-
Q: What exactly does it mean to define a relation? Determine the aspects that contribute to the…
A: Start: A connection is the same thing as a table with two dimensions. It includes a certain…
Q: According to another non-key attribute, what is the connection between the primary key and a non-key…
A: The term "functional dependence" refers to the relationship between two features. A relationship,…
Q: 1. Write the names of the parts indicated by the arrows in the figure below: Book (book number -…
A: The above given question contains four sub questions based on the relational data base where each…
Q: 17. If X, Y and Z are Boolean variables, then (X+Y)(X+Z)=0, if X, Y, Z takes the value A. 1,0,0 В.…
A: Hello Student. Warm Welcome from my side. Hope you are doing great. I will try my best to answer…
Q: This relation in which degree of NF? _Explain why?
A: Note: There are multiple questions are given in one question. According to the rule, you will get…
Q: Summarize six important properties of relations
A: Given: Summarize six important properties of relations
Q: Discuss each of the following concepts in the context of the relational data model: (a) relation (b)…
A: Relational Data Model The logical data structures—the data tables, views, and indexes—are different…
Q: How many properties will an equivalent relationship satisfy? a) 1 b) 2 c) 3 d) 4
A: 3 properties will an equivalent relationship satisfy.
Q: What is a relation, exactly? Determine the traits that make up a relationship.
A: A relation is a table with two parts. It shows how many rows (called "tuples") and columns there are…
Q: Give an example of each of the three types of relationships.
A: Give an example of each of the three types of relationships.
Q: If there are more than one possible candidate keys, provide some instances of relations that have…
A: A candidate key is set of keys which uniquely identifies records. It is possible to have multiple…
Q: Given the following relation that stores details of employees and their projects:
A: There are functional dependencies given that are consistent. We want to differentiate them whether…
Q: Give some examples of relationships and their cardinalities?
A: The mapping of entities, i.e. zero, one, or many, is known as cardinality. It describes how one…
Q: Give an example of a relationship with a single composite key.
A: Intro A unique key is one that identifies a row in a relation uniquely. The unique key may be…
Q: Please draw two sets of ERDS: the first set represents a strong relationship between witches and…
A: Explanation: 1) In the below diagram, Witch is a strong entity and a strong entity will have an…
Q: Normalise the data to third normal form, showing all steps with explanations. Dependency diagrams or…
A: The primary key for the given relation is {PlayerName, CharacterName} The FDs are PlayerName ->…
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: When mapping the (M To N) relationship all we do is move the key attribute to one side from the many…
A: Lets see the solution.
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: WHAT IS THE RELATIONSHIP THIS TABLE ZERO TO MANY OPTIONAL ? ONE TO MANY ? ONE MANDATORY ? ONE TO…
A: In ER diagrams, there are many relationships between the entities. That are: Zero to one Zero to…
Q: Choose the resultant relation(s) after transforming the below ERD. A2 A1 A3 ENTITY A Rel O A.…
A: A relationship between two entities of a similar entity type is called a recursive relationship.…
Q: Explain the use of the terms relation, tuple, and attribute.
A: Answer: In the language of database historians, term relation is used to denote a Table. Each…
Q: 9. Consider relation schemas and instances given below. In each question below, write a SQL query…
A:
Q: 14. A _____ is a property of the entire relation, rather than of the individual tuples in which each…
A: Python is an interpreted, object-oriented, high-level programming language with dynamic semantics.…
Q: Consider a relation with schema R(A,B,C,D,E,F,G). Choose the key for the relation for the following…
A: Given set of Functional Dependency : A --> B B --> C C --> D D --> E E --> F F…
Q: Consider the following relational schema, representing five relations describing shopping…
A: The relational schema defines the relation between entities and attributes. The entities in a…
Q: 9- as in below, what is the use of giving a lang attribute to tag, or a tag?
A: Use Lang attribute in HTML tag
Q: Relational Database Consider the following relation: Invoice(Order_ID, Order_Date, Customer_ID,…
A:
Q: Draw the relationships,identify the business rules,depicted in the Crow's foot ERD shown in the…
A: In a particular subject of knowledge, an entity-relationship model (or ER model) represents…
Q: Exercise 3.17 Consider the ER diagram that you designed for the Prescriptions-R-X chain of…
A:
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- With examples, explain the distinctions between is-a relationship and has-a relationship.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.Draw the associations that are described by the following business rules. Include the multiplicities for each relationship. (4 marks) A patient must be assigned to only one doctor, and a doctor can have one or many patient: An employee has one phone extension, and a unique phone extension is assigned to an employee. A bookstore sells at least one book, and a book can be sold at up to 10 other bookstores around town.
- By giving an example, define the following terms: A. Coding B. Relation and RelationshipExercise 4: R1 = {(a, b) E R² | a > b}, the “greater than" relation, R2 = {(a, b) E R² | a > b}, the “greater than or equal to" relation, R3 = {(a, b) E R² | a < b}, the "less than" relation, R4 = {(a, b) E R² | aHere is a table representing a relation named K: ABC 012 345 678 Identify: 1. The attributes of R. 2. The schema of R. 3. The tuples of R. 4. The components of the tuples for each attribute of R. Which of the following is NOT a true statement about relation R? OA. The schema of R is R(A,B,C). O B. (0,3,6) is a tuple of R. O C.4 is the value of the B-component of one of the tuples of R. O D. (3,4,5) is a tuple of R.Study the following. A customer can place one or more orders, but an order belongs to only one customer. A customer is described by its name, delivery address, and contact number. While an order is described by order number, order status, and order date. Only one payment is made for an order. An order can be paid for through one of two options. A payment is either cash or debit. A payment has an amount attribute. Cash payment is described by cash tendered, while debit payment is described by number, type, and expiry date 6.1 Use the scenario to draw a UML class diagram.Let R₁ and R₂ be the relations on X={a,b,c}, R₁={ (b,a), (c,b), (a,c) } R₂={ (a,c), (b,c)} R₁-¹= R₂ ° R₁=PLZ help with the following: Create a Crow’s Foot ERD. Draw YOUR entity relationship diagram (ERD) to indicate entities, relationships, connectives, and resolve M:N relationships. For the following: The faculty and students (we refer to them in our system as clients) can electronically check out any book at any time. A book must have at least one author but can have more authors. An author must have written at least one book or more to be included in the system. A book may have neverbeen checked out, but can be checked out many times by the same client or different clients over time. A client may have never checked out a book or they may have checked out many books over time. To simplify determining which client currently has a given book checked out, a M:N relationship between BOOK and CLIENT should be maintained. The information recorded for each book is book number, book title, book subject, and year of publication. For each author, the library records the author ID,…What is the degree of relationship?Give an example of a relationship of degree threequestion one: defined the following relation on A={0,2,5,6} Answer each of the following questions by listing the index of the relation. For example, for Part 1), if R1 and R2 and are reflexive, simply enter 1, 2 as the answer.1) Which relations are reflexive? 2) R0={(0,6),(6,6),(6,2),(0,0),(0,2),(2,2),(5,5)} 3) R1={(6,6),(2,2),(5,5),(0,0),(0,6)} 4) R2={(0,6),(6,6),(0,0),(5,6),(6,5),(5,0),(5,5),(2,2),(0,5) 5) R3={(5,5),(0,0),(6,6),(2,2) 6) R4={(5,5),(6,2),(6,6),(0,0),(6,5),(2,6),(2,2)} 1) Which relations are reflexive? 2) Which relations are symmetric? 3) Which relations are anti-symmetric? 4) Which relations are transitive? 5) Which relations are equivalence relations? 6) Which relations are partial orders? question two :defined the following relation on A={0,1,5,6} Answer each of the following questions by listing the index of the relation. For example, for Part 1), if R1 and R2 and are reflexive, simply enter 1, 2 as the answer. R0={(5,5),(0,0),(6,6),(1,1)}…Create an Entity-Relationship model for the following descriptions: Doctors, nurses, and patients have the following unique numbers respectively: doctorNo, nurseNo, and patientNo.SEE MORE QUESTIONS