Modern Database Management
13th Edition
ISBN: 9780134792293
Author: Hoffer
Publisher: PEARSON
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Chapter 1, Problem 1.27PAE
Program Plan Intro
Identification of one to many or many to many relationships and a diagram for each of the relationships.
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Draw an Entity Relationship Diagram for all of those below. (a simple one)
Each lecturer is identified by a unique number, name and phone. A lecturer teaches several courses, and for each course there is a unique code and title (not necessarily unique). There might be several lecturers in a course.
Each course requires one or more text books. Each text book is used in at least one course. A text book is identified by a unique ISBN, and its title, authors, publisher and year of publication are known. Each course has a unique code.
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For each of the following pairs of related entities, indicate whether (under typical circumstances) there is a one-tomany or a many-to-many relationship. Then, using the shorthand notation introduced in the text, draw a diagram for each of the relationships.a. STUDENT and COURSE (students register for courses)b. BOOK and BOOK COPY (books have copies)c. COURSE and SECTION (courses have sections)d. SECTION and ROOM (sections are scheduled in rooms)e. INSTRUCTOR and COURSE
Prepare an Entity Relationship Diagram for the application described in the following paragraph.
Pick and Shovel Construction Company is a multi-state building contractor specializing in medium-priced town homes. Assume that Pick and Shovel’s main entities are its customers, employees, projects and equipment. A customer can hire the company for more than one project, and employees sometimes work on more than one project at a time. Equipment, however, is assigned to only one project at a time. Draw an ERD showing those entities.
Chapter 1 Solutions
Modern Database Management
Ch. 1 - Prob. 1.1RQCh. 1 - Prob. 1.2RQCh. 1 - Prob. 1.3RQCh. 1 - Prob. 1.4RQCh. 1 - Prob. 1.5RQCh. 1 - Prob. 1.6RQCh. 1 - Prob. 1.7RQCh. 1 - How are relationships between tables expressed in...Ch. 1 - What does the term data independence mean, and why...Ch. 1 - Prob. 1.10RQ
Ch. 1 - Prob. 1.11RQCh. 1 - Prob. 1.12RQCh. 1 - Prob. 1.13RQCh. 1 - Prob. 1.14RQCh. 1 - Prob. 1.15RQCh. 1 - Prob. 1.16RQCh. 1 - Prob. 1.17RQCh. 1 - Prob. 1.18RQCh. 1 - Prob. 1.19RQCh. 1 - Prob. 1.20RQCh. 1 - Prob. 1.21RQCh. 1 - Prob. 1.22RQCh. 1 - Prob. 1.23RQCh. 1 - Prob. 1.24RQCh. 1 - Prob. 1.25RQCh. 1 - Prob. 1.26RQCh. 1 - Prob. 1.27PAECh. 1 - Prob. 1.28PAECh. 1 - Prob. 1.29PAECh. 1 - Prob. 1.30PAECh. 1 - Prob. 1.31PAECh. 1 - Prob. 1.32PAECh. 1 - Great Lakes Insurance would like to implement a...Ch. 1 - Figure 1-22 shows an enterprise data model for a...Ch. 1 - Prob. 1.35PAECh. 1 - Prob. 1.36PAECh. 1 - Prob. 1.37PAECh. 1 - Prob. 1.38PAECh. 1 - Prob. 1.39PAECh. 1 - Prob. 1.40PAECh. 1 - Prob. 1.41PAECh. 1 - Prob. 1.42PAECh. 1 - Prob. 1.43PAECh. 1 - Prob. 1.44PAECh. 1 - Consider the project data model shown in Figure...Ch. 1 - Answer the following questions concerning Figures...Ch. 1 - Prob. 1.47PAECh. 1 - Helen Jarvis wants to determine the most important...Ch. 1 - In this chapter, we described four important data...
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- Data modeling is most often accomplished through the use of a(n) __________________. a. entity-relationship diagram b. data-flow diagram c. functional decomposition diagram d. activity diagramarrow_forwardAn Entity Relationship (ER) Diagram is a type of flowchart that illustrates how “entities” such as people, objects or concepts relate to each other within a system. Consider the following description of a system: A university registrar’s office maintains data about following entities: Courses, including number, title, credits, syllabus, and prerequisites. Course offerings, including course number, year, semester, section number, instructor, timings and classroom. Students, including student-id, name, and program. Instructors, including identification number, name, department, and title. Furthermore, the enrollment of students in courses and grades awarded to students in each course they are enrolled for must be appropriately modeled. Construct an ER Diagram for the registrar’s office. Document all assumptions that you make about the mapping constraints.arrow_forwarddevelop an Entity Relationship Diagram for the application described in the following paragraph. Pick and Shovel Construction Company is a multi-state building contractor specializing in medium-priced town homes. Assume that Pick and Shovel's main entities are its customers, employees, projects and equipment. A customer can hire the company for more than one project, and employees sometimes work on more than one project at a time. Equipment, however, is assigned to only one project at a time. Draw an ERD showing those entities.arrow_forward
- TRUE or FALSE - Generalization (is-a) is the relationship established between entities to show that sub-entities that are derived from the generalized entity. Select one: a. TRUE b.FALSEarrow_forwardDraw 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.arrow_forwarddraw the er diagram and labelarrow_forward
- Please draw the ER diagram. Explain how you know which one is entity, attribute, and all constraints. Explain each step of the diagram.arrow_forwardAssignment: Problem #7 from Chapter 4 of the textbook. The case study is United Helpers. With the use of Microsoft Visio, draw YOUR entity relationship diagram (ERD) using Crow's foot notation to indicate entities, relationships, optionalities, connectivities and cardinalities. In addition, be sure to include a heading on your ERD with a brief descriptive title, your name, and a date. It is suggest that you write out business rules but the rules do not need to be submitted. 7. How would you (graphically) identify each of the following ERM components in a Crow’s Foot notation? an entity the cardinality (0,N) a weak relationship a strong relationshiparrow_forwarddraw Entity Relationship Diagram (ERD) for scenairo: “There is a group of employees who have run the website. Three admins are responsible to check registration forms filled by babysitters. An accountant is responsible to check fees payments. All these employees are supervised by the manager. Each babysitter can register on the website one time by filling in her data including first and last names, qualifications, fee rate per hour (25 SAR per Hour), contact information, address, photo, and years of experience. The system will issue for her id and registration date. Mothers can make booking as many as they need. For each time, they must fill in their names, contact information, address, number of children, the date and time (e.g. from 2:00 PM to 4:PM) of booking. The website will generate the booking report including mother’s data, babysitter’s contact data, number of booked hours, fee rate per hour, fees total amount, and tax (%5). To make a payment, the mother needs the…arrow_forward
- Entity-Relationship Diagram (ERD) is one of the data modeling tools that provides a software engineer with the ability to represent data objects, their characteristics, and their relationships. Use an ERD to describe the following scenario. A teacher is identified by an ID number (TID), last name (LName), and first name (FName). A project is identified by a project ID (PID) and title (T). A student is identified by an ID number (SID), last name (LName), and first name (FName). A teacher can supervise zero, one, or many students and a student is supervised by one teacher. A teacher must propose one or many projects and every project is proposed by one teacher. A student must work on one project and every project is worked by only one student.arrow_forwardQ2/II draw the entity relationship for each of the following: 1-" a student studies one or many modules and a module is studied by one or many students". 2-" a manager leads one or many employees and an employee is led by one and only one manager". 3-" a manager leads one or many employees and an employee is led by one and only one manager and if there is a manager who has no employees to lead". 4- "a classroom has one and only one lecturer to manage and a lecturer has one and only one classroom". 5- "each classroom has one or many students registered in and a student has one or many classrooms to be registered in".arrow_forwardConsider the following entity relationship diagram. Booking Employee Room Building • Booking ID • Employee ID • Building ID • Room ID • First Name • Room ID P • Name Description • Employee ID • Name Last Name • Date • Campus Zone • Email Address • Capacity • Start Time • Map Coordinates Phone • Bookable • End Time For each statement below, use the drop-down box to indicate whether it is true (answer 1) or false (answer2), according to the design decisions encoded in the ERD. Every booking is associated with exactly one employee. ✓ Every employee is associated with at most one booking. ✓ A building may contain no rooms that are recorded in the database. Each room may have many bookings. 1. True ✓ A room must have at least one booking. 2. False ✓ A booking can be associated with many employees. An employee may have no phone number recorded. ✓ A room must have its capacity recorded. ✓ A building is uniquely identified by its map coordinates.arrow_forward
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