Answered: Weak entities mean what? Key is...…

Weak entities mean what? Key is... Example needed. What's "various specialisation"?Does the ER diagram include me? Case study and illustration.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Related questions

Q: Is it accurate that associative entities are also regarded as weak entities? What justification or…

A: Associated thing: One or more instances of an entity type are linked together by an associative…

Q: Draw a class design of a gpa calculator including Entity Classes Attributes: datatypes,…

A: According to the question, we have to Draw a class design of a GPA calculator. In step 2, we will…

Q: Is it true that associative entities are likewise considered to be weak entities? What is your…

A: Introduction: An associated entity is one that is placed between two other entities to break up a…

Q: Use a named entity recognition tool to demonstrate the software's functionality. Give an account of…

A: Named Entity Recognition (NER) is a subtask of Information Extraction (IE) that seeks to locate and…

Q: Assume that a main key characteristic is also a candidate key. What would be your reaction?

A: If a main key characteristic is also a candidate key, I would be happy. This means that the database…

Q: Analyze the diagram bellow and transform it from conceptual model to a logical model using the…

A: Logical model: it defines the relationship between the entities and data elements…

Q: With neat diagram, explain the iterative process of calibrating a model.

A: Given question has asked to explain the iterative process of calibrating a model with neat diagram.

Q: Consider the differences and similarities between concentration and breadth. There is an instance…

A: In the background of file systems, the terms "attentiveness" and "breadth" aren't used in the…

Q: Provide a separate ER diagram representing each of the following situations. 1.A is an entity. It…

A: ER diagram 1)

Q: Is it accurate that associative entities are also regarded as weak entities? What justification or…

A: Associated thing: • The connection between entity instances provides more detailed properties. • An…

Q: . What are the distinctions between smooth models and layered models when it comes to VES modeling

A: Introduction Virtual Network Functions (VNFs) are virtual network services running on open computing…

Q: Write an abstract text about CMMI ( Capability Maturity Model Integration). Also use graphs, tables…

A: Given: Write an abstract text about CMMI ( Capability Maturity Model Integration). Also use graphs,…

Q: Consider the following E/R diagram with isa relationships, in which every node represents an entity…

A: Here I am explaining this with an example. For this example I filled up the blank entities with some…

Q: Build a Sequence Diagram of MakingAppointment with Doctor based on the following flow of events.…

A: In the given sequence diagram The Patient and the Receptionist are the actors. The Hospital system…

Q: Give me UML diagram A football association is comprised of something like four football crews.…

A: You can find the complete UML diagram for above activity. See below steps for code.

Q: Discuss the importance of cache memory in enhancing system performance.

A: Cache memory is a sort of volatile computer memory that is tiny and fast enough to give a processor…

Q: Consider the differences and similarities between concentration and breadth. There is an instance…

A: Concentration emphasizes specialization and depth of knowledge in a specific area, while breadth…

Q: Discuss the use of the term "accuracy" in categorization difficulties. Is it a good or terrible idea…

A: Discuss:- The accuracy in classification problem. Whether it is good or bad to measure the…

Q: Discuss about the following, (a) Class and object diagrams (b) CRC diagram and CRC model index card…

A: The Given data is Discuss About class nd Object diagram CRS diagrams and model index card Sequence…

Q: You might write about the pros and cons of the star schema instead of the snowflake form. Which one…

A: The star schema and snowflake schema are two common data modeling techniques used in database…

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: Draw an ERD for the following situation (Batra et al., 1988). Also, develop the list of words for…

A: ER Diagram:- A Diagram of Entities Relation (ER) is a kind of flowchart that shows how "entities"…

Q: Define Attribute interpolation.

A: When making the application using the Angular, users come in contact with some ways for showing data…

Q: There is value in adopting either descriptive or prescriptive models, but which is more so?

A: Answer: Both descriptive and prescriptive models have value in different contexts, so it's difficult…

Q: What is weak entity type? The formula? For instance. Alternative specialisation?What does the ER…

A: A weak entity kind in an Entity-Relationship (ER) replica is an entity that cannot be Exclusively…

Q: What is the definition of "weak entity type"? Does it have a secret? Can you elucidate what…

A: A weak entity type is an entity that cannot be uniquely identified by its attributes alone, and…

Q: A weak entity type is what? The secret? Give an instance: A specialization of attributes?What does…

A: In the world of database design, entity-relationship (ER) modeling plays a crucial role. ER diagrams…

Q: DRAW ER diagram for the Scenar In a college, STAFF is identified by StaffName (that consists of Fnam…

A: The entity of ER diagram is Staff Course Book The relationship between course and book is many to…

Q: Are associative entities also weak entities? Why or why not? If yes, is there anything special about…

A: Associative entity: • An associative entity associates the instances of one or more entity types. •…

Q: What exactly does it imply when we talk about the weak entity type? What exactly is the key? Please…

A: In the context of entity-relationship modeling, a weak entity type is an entity type that depends on…

Q: Course: Organization Modeling for DT (11) The Ecosystem map diagram can be used to model the…

A: Introduction: Organization modeling is a process of creating a graphical representation of the…

Q: Please specify weak entity type. Its secret? An example What is attribute specialisation?ER…

A: a weak entity is a type of entity that cannot be uniquely identified by its own attributes.…

Q: Q.3/ Give one example for each type of associations in the domain of class diagram.

A: If one object owns another object. And another object cannot exists without the owner, that it is…

Q: Generalization is Select one: O a. The process of giving an entity special attributes O b. The…

A: Basically Generalization is the process of defining general entity from set of specialized entities.…

Q: Consider two sets of entities A and B, each of which has the property X (among other qualities whose…

A: Summary ER model or diagram is also known as ER Schema. The ER model is built on two key ideas:…

Concept explainers

Enhanced ER Model

The enhanced ER model is an abbreviation for Enhanced Entity-Relationship (EER) model. As you know, the entity-relationship (ER) model is a pictorial illustration of the relationship between various entities of a domain. In the case of a large amount of data with multiple interrelated entities, the ER diagrams become complex and tough to interpret. For such cases, the need for enhancement in the ER model was observed, and thus, the EER model was designed.

Question

Weak entities mean what? Key is... Example needed. What's "various specialisation"?Does the ER diagram include me? Case study and illustration.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Sympathetic Weak Entities in ER Modeling:

VIEW

Step 2: Unraveling the Concept of Various Specializations:

VIEW

Solution

VIEW

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions

Provide explanations for the following terms: association, class diagram, event, object, object class, operation, sequence diagram, state, state transition, unified modeling language, and use case.
Is it accurate that associative entities are also regarded as weak entities? What justification or lack thereof do you have? If true, how does their "weakness" differ from that of others?
Draw UML class diagram according to descriptions given below. Please include appropriate labeling and multiplicity in your diagrams. You do not need to include the attributes and operations for the classes. A Rectangle object is composed of exactly four Line objects A Customer object is able to initiate zero or more Transaction A Student Object must enrolls in at least one, at most five Subject A Mouse object is kind of a Rodent A Rodent object is a kind of Mammal Object.
Please provide definitions for the following terms: association, class diagram, event, object, object class, operation, sequence diagram, state, state transition, unified modeling language, and use case.
Exercise No.1. How to explain in details the diagram? Exercise No.2. How to explain in details the sequence of activity execution of this diagram? Exercise No.3. How to explains in details sequence of activity execution (especially the decision node) of this diagram? All above exercise based on Object-Oriented Modeling knowledge.
"Weak entity type" means what? Does it hide something? What's "attribute"?How would an ER chart show sia? Please draw.
Can you define the weak entity type for me? Is there a secret to it? Provide an instance Just what does it mean to specialize in attribute?Where does ia fit into an ER diagram? Provide Illustration or Diagram
Q176) The diagrams can be drawn to represent the system from different perspectives. The same elements may appear in different diagrams. The diagram contains the collection of elements and relationship among these elements. In order to maintain harmony among the models what UML rules are followed? Do not give me irrelevant answer
6. How are class models, state models, and interaction models connect or related to one another?
In OOAD, visibility refers to... Explain its importance in obtaining high levels of abstraction. What are the many types? Include illustrations and code samples to assist you demonstrate your arguments.
Write “Handle Return” use case for POS system and make the necessary changes in domain model to support this use case. Discuss each new entity (Conceptual object(s), association(s) and attributes) added to the model.
Is it true that associated entities are also weak? Why do you think that is? Is there anything unique about their "weakness" if this is the case?