Database Systems: Design, Implementation, & Management
12th Edition
ISBN: 9781305627482
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Expert Solution & Answer
Chapter 4, Problem 7P
Explanation of Solution
Entity Relational (ER) Diagram:
The following figure illustrates the ER Diagram for given business rules using Crow’s Foot notation:
Explanation:
The above ERD, contains several entities such as “VOLUNTEER”, “ASSIGNMENT”, “LIST”, “ACTION”, “ITEM”, “PACKAGE_CONTENT” and “PACKAGE”. Each entity has its own attributes.
- A volunteer can have assignment for several tasks. Similarly, a task can be done by several volunteers. Hence the relationship between the entities “VOLUNTEER” and “ACTION” is M: N...
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
A college course may have one or more scheduled sections or may not have a scheduled section. Attributes of COURSE include Course ID, Course Name, and Units. Attributes of SECTION include Section Number and Semester ID. Semester ID is composed of two parts: Semester and Year. Section Number is an integer (such as 1 or 2) that distinguishes one section from another for the same course but does not uniquely identify a section. How did you model SECTION? Why did you choose this way versus alternative ways to model SECTION?
Each publisher has a unique name; a mailing address and telephone number are also kept on each publisher. A publisher publishes one or more books; a book is published by exactly one publisher. A book is identified by its ISBN, and other attributes are title, price, and number of pages. Each book is written by one or more authors; an author writes one or more books, potentially for different publishers. Each author is uniquely described by an author ID, and we know each author’s name and address. Each author is paid a certain royalty rate on each book he or she authors, which potentially varies for each book and for each author. An author receives a separate royalty check for each book he or she writes. Each check is identified by its check number, and we also keep track of the date and amount of each check. As you develop the ERD for this problem, follow good data naming guidelines.
Each department runs a number of courses. The university provides a set of modules used in different courses. Each course uses a number of modules but not every module is used. A course is assigned a unique course code and a module is identified by a unique module code. A module can be used in one course only, but can be studied by many students. In addition to the module code each module unique title, start date, end date, texts (books), and assessment scheme (i.e., coursework and exam marks percentages) are also stored.
Each course is managed by a member of academic staff, and each module is coordinated by a member of academic staff also. The database should also store each course unique title, and duration (in years).
A student can enroll in one course at a time. Once enrolled a student is assigned a unique matriculation number. To complete a course, each student must undertake and pass all the required modules in his/her course. This requires that the database store the…
Chapter 4 Solutions
Database Systems: Design, Implementation, & Management
Ch. 4 - Prob. 1RQCh. 4 - What is a strong (or identifying) relationship,...Ch. 4 - Prob. 4RQCh. 4 - Suppose you are working within the framework of...Ch. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Discuss the difference between a composite key and...Ch. 4 - What two courses of action are available to a...Ch. 4 - Prob. 11RQCh. 4 - Discuss two ways in which the 1:M relationship...
Ch. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Briefly, but precisely, explain the difference...Ch. 4 - What are multivalued attributes, and how can they...Ch. 4 - Prob. 17RQCh. 4 - Prob. 18RQCh. 4 - What two attributes must be contained in the...Ch. 4 - Describe precisely the composition of the...Ch. 4 - Prob. 21RQCh. 4 - Prob. 1PCh. 4 - Create a complete ERD in Crows Foot notation that...Ch. 4 - Prob. 4PCh. 4 - Prob. 5PCh. 4 - Prob. 6PCh. 4 - Prob. 7PCh. 4 - Prob. 8PCh. 4 - Prob. 9PCh. 4 - Prob. 10PCh. 4 - Prob. 11C
Knowledge Booster
Similar questions
- The following are the basic processes of Boarding School Outing System. Student may enter the outing request such as date, reason, check-out time (check-in time is auto-set at 6.00 PM) to request for outing. The outing request details are stored in 'Outing Request' record. Warden can view the outing request and he/she may approve or disapprove the request. The status of the request is updated in the Outing Request' record. Once the status is updated, a short message service (SMS) notification will be sent by the system to the student and parents. The hand-phone numbers are retrieved from the Student' record. Student will check-out and check-in via this system whenever he/she is about to leave from the school and reports back to the school. The data (date and time) is kept in the existing outing record. Note: **Definition of outing (in boarding school context): A day out from the hostel/school, normally during the weekend. Based on the scenario above: a) Draw a Context Diagram for…arrow_forwardI need the answer as soon as possiblearrow_forwardA course instructor will assign grades from (A, B+, B, C+, C, D+, D, EJ. What is the minimum number of grades that must be assigned in order to guarantee at least one of the grades has been assigned 10 times.arrow_forward
- A laboratory has several chemists who work on one or more projects. Chemists also may use certain kinds of equipment on each project. Attributes of CHEMIST include Employee ID (identifier), Name, and Phone No. Attributes of PROJECT include Project ID (identifier) and Start Date. Attributes of EQUIPMENT include Serial No and Cost. The organization wishes to record Assign Date—that is, the date when a given equipment item was assigned to a particular chemist working on a specified project. A chemist must be assigned to at least one project and one equipment item. A given equipment item need not be assigned, and a given project need not be assigned either a chemist or an equipment item. Provide good definitions for all of the relationships in this situation.arrow_forwardA university has only full-time and part-time instructors. The details of an instructor include name, address, email, and number. The students in the university can enroll in a seminar and the details to be stored for each student include name, student number, and email. Each seminar consists of seminar name and seminar code. Full-time instructors are responsible for taking the seminars. Each seminar can be taken by at least one and at most two instructors. Part-time instructors can teach courses as well as full-time instructors. Each course consists of a name and course code. Students can register for a maximum of five courses per semester. A course can either be a university elective or an area elective. The availability of an area elective course depends on the number of available students for that course. A student can either be a bachelor, master's, or doctorate student. Doctorate students can also be research assistants. Task: Draw a class diagram that consists of all the classes…arrow_forwardThe data requirements are summarized as follows: Each movie is identified by title and year of release. Each movie has a length in minutes. Each has a production company, and each is classified under one or more genres (such as horror, action, drama, and so forth). Each movie has one or more directors and one or more actors appear in it. Each movie also has a plot outline. Finally, each movie has zero or more quotable quotes, each of which is spoken by a particular actor appearing in the movie. Actors are identified by name and date of birth and appear in one or more movies. Each actor has a role in the movie. Directors are also identified by name and date of birth and direct one or more movies. It is possible for a director to act in a movie (including one that he or she may also direct). Production companies are identified by name and each has an address. A production company produces one or more movies. Q: Suppose a single relation “Movie” which contains all attributes of all…arrow_forward
- The data requirements are summarized as follows: Each movie is identified by title and year of release. Each movie has a length in minutes. Each has a production company, and each is classified under one or more genres (such as horror, action, drama, and so forth). Each movie has one or more directors and one or more actors appear in it. Each movie also has a plot outline. Finally, each movie has zero or more quotable quotes, each of which is spoken by a particular actor appearing in the movie. Actors are identified by name and date of birth and appear in one or more movies. Each actor has a role in the movie. Directors are also identified by name and date of birth and direct one or more movies. It is possible for a director to act in a movie (including one that he or she may also direct). Production companies are identified by name and each has an address. A production company produces one or more movies. Consider the database schema in 3NF for the “Movie” database obtained in…arrow_forwardQ1arrow_forwardAn E-learning website needs your help to design its database. They need to store information about teachers and online tutorials. Each teacher has a unique ID, name, and at least one field of specialty. Teachers form groups to prepare online tutorials. Each group has unique name and at least one teacher as a member. Each online tutorial has a title, date and organized by exactly one group. The title of the tutorial is unique for the group. Each tutorial consists of several sessions, described by their titles and durations. Naturally, each session is presented by one teacher and belongs to exactly one tutorial. In addition, sessions on the same tutorial have different titles. Design an ERD for this application. Note any unspecified requirements, and make appropriate assumptions to make the specification complete.arrow_forward
- Please help mearrow_forwardManufacturerA manufacturing company produces products. The following product information is stored: product name, product ID and quantity on hand. These products are made up of many components. Each component can be supplied by one or more suppliers. The following component information is kept: component ID, name, description, suppliers who supply them, and products in which they are used.Assumptions• A supplier can exist without providing components.• A component does not have to be associated with a supplier.• A component does not have to be associated with a product. Not all components are used in products.• A product cannot exist without components. Construct an ERD table to show how you would track this information.arrow_forwardThe French Bakery is a new business project, the owner of the bakery needs a database to keep the essential data and transactions regarding his business. The following requirements of the bakery have been collected: There are different departments in the bakery business, each department has a name, department number, the number of employees, and manager. The database will keep the start date and the end date for each manager. The bakery needs to keep Employee’s name, ID number, Phone number, address, sex, position, and the salary. Each employee work for a specific department. Each employee has a supervisor. Some employees have more than one position. To keep contact with customers and provide customer services and marketing, the bakery requires customer’s name, address, Cnumber (which is unique for each customer), email, and the phone number. The bakery sells many products, each product has a name and a price, and the calories’ amount. The manager will be responsible of…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Programming Logic & Design ComprehensiveComputer ScienceISBN:9781337669405Author:FARRELLPublisher:Cengage
Programming Logic & Design Comprehensive
Computer Science
ISBN:9781337669405
Author:FARRELL
Publisher:Cengage