Define Unary Relationship. Give example by using Entity Relationship Diagram
Q: Unified Modelling Language (UML) is often used as a notation when drawing Entity-Relationship…
A: Unary Relationship When there is a relationship between two entities of the same type, it is known…
Q: Define the term ID-dependent entity, and give an example other than one used in this text. Draw an…
A: Note: There are multiple questions are given in one question. According to the rule, you will get…
Q: Explain entity-relationship (ER) diagrams.
A: Please find the detailed answer in the following steps.
Q: Draw an entity-relationship (E-R) diagram torepresent common business situations.
A:
Q: Show that you understand the Entity-Relationship Model and how it works.
A: Introduction: ER model stands for an Entity-Relationship model. It is a high-level data model. This…
Q: Describe the Entity-Relationship model.
A: Answer : Entity relation model or E-R model is the graphical representation of an information that…
Q: Prepare an entity relationship diagram for the revenuecycle that includes entities, cardinalities,…
A: An ER diagram using crow's foot notation has been designed to comply with the given business rules .…
Q: What is An entity-relationship model (e-r model)?
A: Given:- What is An entity-relationship model (e-r model)?
Q: Explain the distinction between entity type and entity instance.
A: GIVEN: Explain the distinction between entity type and entity instance.
Q: Give an example of each of the following, other than those described in this chapter, and clearly…
A: Ternary relationship: In this kind of relationship three entities participate to make a…
Q: What is an Entity Relationship Diagram? Can you show me an example.
A: An ER diagram shows the relationship among entity sets. An entity set is a group of similar entities…
Q: The following statements are correct for. 1. Certain attributes may apply to some but not all…
A: Generalization: Based on the common features that exists among a set of entities, they can be…
Q: Draw an Entity Relationship Diagram for the following scenario A, B, and C are entities. There is a…
A: The given problem is related to creating Entity relationship diagram where the entities and…
Q: Explain the Entity-Relationship model and how it works.
A: Introduction: They are also known as the ERDs or ER Models, and they use a preset collection of…
Q: Give an example of how attributes are used in a relationship model, and what the generic term for an…
A: Entities in the ER model contain characteristics that may be single-valued, multi-valued, composite,…
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: 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: Give an Example of a weak entity and its identifying relationship?
A: Note: There are multiple questions are given in one question. According to the rule, you will get…
Q: Design an Entity Relationship Diagram for the following example
A: For given given scenario we can have following entities and their corresponding attributes :…
Q: Define the concept of a one-to-many relationship.
A: In DBMS, One to many relationship is one in which the relationship between two entities say A and B…
Q: Interpret the different form of Entity used in the given scenario of ER diagram. Illustrate the…
A: Strong entity Account Region Item creep Weak Entity Character Item Instantiation creep…
Q: Describe the objective of an entity-relationship model.
A: Entity Relationship Diagram: The ERD (or Entity Relationship Diagram) is a tool for discussion,…
Q: Describe the entity-relationship model in detail.
A: Entity relationship models are based on the real-world entities and their relationships.
Q: draw Er model : for the entity( booking,movie show, ticket, user, employee,payment) with the…
A: ER DIAGRAM for given entity is given below we use following entity booking Movie show Ticket…
Q: How do you map a "One to Many" relationship when mapping ER Diagram to Schema
A: To map one to many relationships, the primary key on the `one side' of the relationship is added to…
Q: Exercise One | 1..* K 0..1 G Identify all the relationships in the UML relationship diagram above.
A: Symbols are: form first image: (A B F and E) A "has a" B (Aggregation), B "is a" E (Inheritance)…
Q: Use ER Assistant to draw your diagram. Draw a self-referencing entity type for the Employee…
A: The diagram is shown below
Q: Explain the difference between an entity class and an entity instance.
A: Entity: Entity may be a thought to abstractly represent all instances of a bunch of comparable…
Q: Explain Entity Relationship Diagram with a suitable example.
A: Entity Relationship Diagram Entity–relationship diagram describes a structure of the database with…
Q: Give a detailed description of an entity. Define and illustrate with sample an Entity Relationship…
A: Entity: It is described as a real-world object. It has a physical existence and a conceptual…
Q: Describe the entity-relationship model and how it works.
A: Entity relationship: Entity relationship models are based on the relationships between real-world…
Q: Define a one-to-many relationship.
A: One-to-Many Relationship For Table X and Table Y If only one record from table X is related to more…
Q: The below Entity Relationship Diagram (ERD) is in second normal form. Draw a new ERD in third normal…
A: New ERD in third normal form is an given below :
Q: Create an entity relationship diagram based on the following DFD Level 0
A: ERD stands for Entity Relationship Diagram which has a graphical representation of an information…
Q: Describe the goal of an entity-relationship model in your own words.
A: Locating data in a logical place is the main goal of entity relationship model
Q: A customer can make many payments, but each payment is made by only one customer.” Use this scenario…
A: ERD MODEL: An ER model or entity relationship model is a data representation model that is used to…
Q: Use an appropriate example to explain Entity Relationship Diagram.
A: Entity Relationship Diagram Entity–relationship diagram describes a structure of the database with…
Q: Why is it recommended that every ternary relationship be converted into an associative entity?
A: GIVEN: Why is it recommended that every ternary relationship be converted into an associative…
Q: Creation of Entity Relationship Diagram Draw the entity relationship diagram (ERD) for this…
A: Entity Relationship Diagram :- An Entity Relationship Diagram (ERD) is a visual representation of…
Q: Describe the purpose and operation of an entity-relationship model.
A: Models of entity relationships are based on the relationships between entities in the actual world.…
Q: Entity Relationship Diagram and Class Diagram are two diagramming techniques sharing common…
A:
Q: DEFINE ENTITY EXTRACTION AND ER DIAGRAM'
A: Entity extraction Entity extraction is an information extraction technique. It is the process of…
Q: Define an entity-relationship model and describe its purpos
A: Actually, the answer has given below:…
Q: Demonstrate your understanding of the Entity-Relationship Model and its function.
A: Introduction: A problem domain's information structure is represented in terms of entities and…
Q: Create an entity-relationship diagram for the three entities showing the correct cardinalities
A: An entity-relationship diagram for the three entities showing the correct cardinalities is as…
Q: Consider the scenario described by the statement "A customer can make many payments, but each…
A: Explanation: The Scenario “A customer can make many payments, but each payment is made only by one…
Step by step
Solved in 2 steps with 2 images
- Draw the relationships and entities model for each of the following: * in the traditional way* for example: see the pic??. In the database of the library, the author can author more than one book, and the book can be subscribed toWritten by more than one authorSuppose relations R(A,B) and S(B,C,D) are as followsFor this assignment, please consider the following scenario – You are being asked to articulate the asymmetric key exchange of RSA-1024. Using the drawing tools built into Word, Google Docs, Pages, or your favorite animation tool, and draw the key exchange. List out the steps involved in the key exchange, starting with the request to access and finishing with granting access.
- 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.(1) How to prove H using given rules and facts: Rules: Rule 1 A ∧ B → C Rule 2 A → D Rule 3 C ∧ D → E Rule 4 B ∧ E ∧ F → G Rule 5 A ∧ E → H Facts: Fact 1 A Fact 2 B Fact 3 F Hint: The goal is to prove H. First let us use forward chaining. As the conflict resolution strategy, one will fire rules in the order they appear in the database. Let us fire Rule 1, which means to add C to the fact database. Next, Rule 2 is fired, meaning we add D to our fact database. We now have the facts A, B, C, D, F, but we have not yet reached our goal, which is H. Please list the rules to be triggered to add fact H to the database. Now consider using backward chaining. Does backward chaining use fewer rules?From the given set of functional dependencies,determine that there can be more than one canonical cover . X →YZ, Y →XZ, and Z →XY .
- Convert the following relation to 2NF, and then to 3NF. Show both conversions. (h, n, c, a, f, k, p, r, g, i, m, b, o, d, j, l, s, e) Functional Dependencies: p → j m, b → l h → g n → p n → o c → i n → j p → o h → d s → e a → rThree examples are given to illustrate when it is necessary to create a surrogate key in place of the primary key of a connection.Passenger (pid, pbithday, pcity)Station (sid, sname, sxcoord, sycoord)CheckIn (pid, departure_sid, arrive_sid, departure_date, arrive_date)departure_sid reference sid in Stationarrive_sid reference sid in Stationpid references pid in Passenger there are 400 million Passenger, 500 stations, and 20 billion checkIn stored in the schema. For simplicity, assume that every attribute is of size 8 bytes, and the size of each tuple is thus 8*x bytes for a table with x attributes, and that the size of a table is simply the size of a tuple multiplied by the number of tuples (i.e., 100% occupancy and no gaps or space for block metadata). Now consider the following queries: SELECT P.pidFROM Passenger p, CheckIn C, Station SWHERE P.pid = C.pidand C.departure_sid = S.sidand S.sname = "LA"and year(P.pbithday) = 2000and date(C.departure_date) = "2015-12-12" question:1. first join P with C, and then join result with S2. first join S with C, and then join result with PWhich way would be faster for this…
- Consider the following relations: Employee(E_id: integer, E_name: string, Age: integer, Salary: real) Works(E_id: integer, Dep_id: integer, Start_date: date) Department(Dep_id: integer, Dep_name: string, Budget: real, Manager_E_id: integer) What referential integrity constraints exist between these relations? What are the options for enforcing these constraints when a user attempts to delete a Dept tuple?Store the following fields for a library database: AuthorCode, AuthorName, BookTitle, BorrowerAddress, BorrowerName, BorrowerCardNumber, CopiesOfBook, ISBN (International Standard Book Number), LoanDate, PublisherCode, PublisherName, and PublisherAddress. A one-to-many relationship exists between publishers and books. Many-to-many relationships exist between authors and books and between borrowers and books. Without creating a set of dependency diagrams, write the relational schema that meet 3rd NF requirements.What kind of Entity instance would it be? REGISTRATION, COURSE, AND STUDENT A. Ali, Mohammed, and Khalid; B. Stud ID and Stud Name; C. STUDENT, COURSE, AND REGISTRATION Ali, Mohammed, Khalid; Stud ID; Stud Name; Student; Course d. Offers, records, and consists of