Modern Database Management (12th Edition)
12th Edition
ISBN: 9780133544619
Author: Jeffrey A. Hoffer, Ramesh Venkataraman, Heikki Topi
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 2, Problem 2.38PAE
Review Figure 2-8LQ and Figure 2-22.
- Identify any attributes in Figure 2-22 that might be composite attributes but are not shown that way. Justify your suggestions. Redraw the ERD to reflect any changes you suggest.
- Identify any attributes in Figure 2-22 that might be multivalued attributes but are not shown that way. Justify your suggestions. Redraw the ERD to reflect any changes you suggest.
- Is it possible for the same attribute to be both composite and multivalued? If no, justify your answer; if yes, give an example. (Hint: Consider the CUSTOMER attributes in Figure 2-22.)
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
ERD Diagram LucidChart
Please be sure to accurately draw each entity, connecting lines, cardinality, actions (relationships), and attributes.
Please be sure to properly label – if appropriate – your attributes.
Please be sure to designate a primary key and foreign key(s) for each attribute.
Please sure to properly label your associative entity – if appropriate.
Please be sure to add to your diagram entities “user defined” primary key fields and appropriate foreign key fields
Red Light Minor Emergency Clinic located in Wichita Falls, Texas is a 24-hour clinic that provides patients with minor emergency medical care. The clinic would like you to draw and ERD diagram that depicts their customer care process. The nurses working at the clinic can provide care to many patients, and the patient can be seen by many nurses. The clinic would only like to track the nurse’s name (first name and last name). The clinic would like to keep track of the following patient information to include…
Create a logical data model documented with an ERD using the crow’s foot format. Be sure that each entity has the entity name at the top of the box, the primary key attribute or attributes in the middle of the box, and the non-key attributes in the bottom of the box. Lines should separate each part of the entity box. Follow these instructions about each ERD: ● The ERD must not have any many-to-many (m:n) relationships.
● All attributes must be placed within an entity.
● Each entity must have a primary key defined. A primary key can consist of one or more attributes.
● Each relationship must have a foreign key. Denote the foreign key(s) with the notation (FK) on the ERD. Remember that in a one-to-many relationship, the foreign key is placed in the entity that is on the many side of the relationship.
● Each relationship must include both a maximum and minimum cardinality for both sides of the relationship.
● Each relationship should have a verb or verb phrase to describe it.
Question:…
Create a “level of attributes” diagram for a car rental. Include its core benefit, expected attributes, and add-on attributes. Have any of these attributes changed over the past 10 years? Please explain your answer.
Chapter 2 Solutions
Modern Database Management (12th Edition)
Ch. 2 - Define each of the following terms: entity type...Ch. 2 - Prob. 2.2RQCh. 2 - Contrast the following terms: stored attribute;...Ch. 2 - Prob. 2.4RQCh. 2 - Prob. 2.5RQCh. 2 - Prob. 2.6RQCh. 2 - State six general guidelines for naming data...Ch. 2 - Prob. 2.8RQCh. 2 - Prob. 2.9RQCh. 2 - State three conditions that suggest the designer...
Ch. 2 - List the four types of cardinality constraints,...Ch. 2 - Prob. 2.12RQCh. 2 - What is the degree of a relationship? List the...Ch. 2 - Give an example (Other than those described in...Ch. 2 - Give an example of each of the following, other...Ch. 2 - Give an example of the use of effective (or...Ch. 2 - State a rule that says when to extract an...Ch. 2 - Prob. 2.18RQCh. 2 - In addition to explaining what action is being...Ch. 2 - For the Manages relationship in Figure 2-12a,...Ch. 2 - Explain the distinction between entity type and...Ch. 2 - Why is it recommended that every ternary...Ch. 2 - A cellular operator needs a database to keep track...Ch. 2 - For each of the descriptions below, perform the...Ch. 2 - Answer the following questions concerning Figure...Ch. 2 - Prob. 2.26PAECh. 2 - You may have been assigned a CASE or a drawing...Ch. 2 - Consider the two E-R diagrams in Figure 2-25 Q,...Ch. 2 - The entity type STUDENT has the following...Ch. 2 - Are associative entities also weak entities? Why...Ch. 2 - Because Visio does not explicitly show associative...Ch. 2 - Figure 2-26 shows a grade report that is mailed to...Ch. 2 - Prob. 2.33PAECh. 2 - The Is Married To relationship in Figure 2-12a...Ch. 2 - Prob. 2.35PAECh. 2 - Figure 2-28 shows two diagrams (A and B), both of...Ch. 2 - Prob. 2.37PAECh. 2 - Review Figure 2-8LQ and Figure 2-22. Identify any...Ch. 2 - Prob. 2.39PAECh. 2 - Prob. 2.40PAECh. 2 - Prob. 2.41PAECh. 2 - Prob. 2.42PAECh. 2 - Prob. 2.43PAECh. 2 - Prob. 2.44PAECh. 2 - Prob. 2.45PAECh. 2 - Prob. 2.47PAECh. 2 - Prob. 2.48PAECh. 2 - Draw an ERD for the following situation. (State...Ch. 2 - Prob. 2.50PAECh. 2 - Prob. 2.51PAECh. 2 - Review your answer to Problem and Exercise 2-49 if...
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
- Draw this ER Diagram, but note that: Ths diagram should adhere to compressed Chen notation : The ER diagram consists of four entities: Pet, Challenge, User, and Vote. The Pet entity has attributes such as id (primary key), name, species, age, and description to store information about each pet profile. The Challenge entity has attributes such as id (primary key), pet1_id and pet2_id (foreign keys referencing the Pet entity), start_date, end_date, and likes to store information about each challenge between two pets. The User entity has attributes such as id (primary key), name, and email to store information about users who participate in voting and challenge creation. The Vote entity has attributes such as id (primary key), challenge_id (foreign key referencing the Challenge entity), user_id (foreign key referencing the User entity), and vote to store information about user's vote for a particular challenge.arrow_forwardDraw an ER diagram for the airport database. Be sure to indicate the various attributes of each entity and relationship set; also specify the key and participation constraints for each relationships. Specify any necessary overlap and covering constraints The FAA passes a regulation that tests on a plane must be conducted by a technician whois an expert on that model. How would you express this constraint in the ER diagram? If you cannot express it, explain briefly.arrow_forwardDraw and ERD digrame for my home work . Below are the standers that should be meet 1) Correct identification of all the entities. Entity names should follow the standard conventions, i.e., they should be singular nouns and written in CAPITAL letters, or at least the first letter is CAPITAL. 2) Correct identification of all the attributes for each of the entities .Correct identification of all the relationships with appropriate connectivity and participation. If the connectivity and/or participation are not clear from the assignment specification, the assumptions made should be clearly stated.3) Introduction of composite/bridging entity to represent many-to-many relationships. 4) Correct representation of strong and weak relationships (solid and dashed line) 5) Correct identification of all the primary keys and foreign keys. The primary keys should be underlined, and foreign keys should be italic.arrow_forward
- Draw ER Diagram considering the various entity sets and relationship sets that are related to Student Hostel System. User- Name, Password, Email, phone, place of live Staff- Name, Password, Phone, Email **Notes those are the advisors who can see the feedback and the complain of the students regarding to the hostels Reservation- bill, Email, location, date Hostel- name, location Notes: Dear team you can add attribute according to your experience in each entity and you can remove. Also I want report entity that contain Feedback and complain from students regarding to the hostel.arrow_forwardIdentify 5 entities making sure that these entities are related in some way (they have relationship). Also form the 5 entities make sure to identify at least 1 weak entity. Identify 5 attributes per entity making sure that you identify the primary key attribute, composite attribute, simple attribute, multivalued attribute and derived attributes. Label attributes accordingly. Create specific tables for the entities and attributes identified in # 1 and 2. Supply 10 tuples (row of values) for each table. Create the ERD for the entities mentioned above include relationship, connectivity and cardinality. For relationship make sure to indicate weak and strong relationship. Use Chen Model for the ERD.arrow_forwardNormalization Repair the ER Diagrams into at least 1nf, 2nf and 3nf Give explanations to all revisions. Refer to lab exercise 5 for the normalization violations that you found in the ER Diagrams. Clearly label all Primary and Foreign Keys for all three diagrams. Show all business rules. for all three diagrams. Show three referential integrity rules for each diagram. You may use Draw.IO to complete this case study.arrow_forward
- Find out five characteristics about each entity, and remember to take note of the primary key attribute, any composite or simple attributes, any multivalued attributes, and any derived attributes. To the extent possible, check the relevant boxes next to each quality.arrow_forwardProvide an example of what a Key Attribute is.arrow_forward1. List down the types of attributes in the Entity-Relationship (ER) model.arrow_forward
- Using the ERD diagram above, identify an attribute that might represent a Composite Attribute. Once you identify, explain why this is so. Is this the only attribute? Are there others?arrow_forwardUsing the ERD diagram above, identify an attribute that might represent a Derived Attribute. Once you identify, explain why this is so. Is this the only attribute? Are there others?arrow_forwardPlease provide a definition of an entity-relationship model as well as an explanation of how it works.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Information Systems (MindTap Course...Computer ScienceISBN:9781285867168Author:Ralph Stair, George ReynoldsPublisher:Cengage Learning
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781305627482Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Principles of Information Systems (MindTap Course...
Computer Science
ISBN:9781285867168
Author:Ralph Stair, George Reynolds
Publisher:Cengage Learning
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781305627482
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Enhanced Entity Relationship Model; Author: Data Science Center;https://www.youtube.com/watch?v=ocQUtXPumdQ;License: Standard YouTube License, CC-BY