A Guide to SQL
9th Edition
ISBN: 9781111527273
Author: Philip J. Pratt
Publisher: Course Technology Ptr
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Expert Solution & Answer
Chapter 2, Problem 11RQ
Explanation of Solution
Functional dependencies:
Functional dependency is a term in the relational
Explanation of Solution
Database:
The given database comprises of the following tables with the respective columns as shown below.
- DEPARTMENT – DEPARTMENT NUM, DEPARTMENT_NAME
- ADVISOR – ADVISOR_NUM, ADVISOR_LAST_NAME,ADVISOR_FIRST_NAME,DEPARTMENT_NUM
- COURSE – COURSE_CODE, DESCRIPTION
- STUDENT – STUDENT_NUM, STUDENT_LAST_NAME,STUDENT_FIRST_NAME, ADVISOR_NUM
Relations:
The term relation refers to the relationship between the data represented in row-column format...
Program Plan Intro
Entity Relationship Diagram (ERD):
Entity relationship diagram is basically a picture or snapshot about the business system. It means that the information stored and created is represented by this diagram.
- Entities may represent the physical object, event, or concept.
- An attribute is a property of an entity.
- Relationship denotes the link between the entities.
- If an independent child entity is present in a relationship then it is called a non-identifying relationship.
- If a dependent child entity is present in a relationship then it is called a non-identifying relationship.
Expert Solution & Answer
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Students have asked these similar questions
A database at a college must support the following requirements:
a. For a department, store its number and name.
b. For an advisor, store his or her number, last name, first name, and the department number to which the advisor is assigned.
c. For a course, store its code and description (for example, DBA210, SQL Programming).
d. For a student, store his or her number, first name, and last name. For each course the student takes, store the course code, course description, and grade earned. Also, store the number and name of the student's advisor. Assume that an advisor might advise any number of students but that each student has just one advisor.
Design the database for the preceding set of requirements. Determine any functional dependencies. List the tables, columns, and relationships. In addition, represent your design with an E-R diagram.
Design a database that can satisfy the following requirements:
a. For each marina, list the number, name, address, city, state, and zip code.
b. For each boat owner, list the number, last name, first name, address, city, state, and zip code.
c. For each marina, list all the slips in the marina. For each slip, list the length of the slip, the annual rental fee, the name and type of the boat occupying the slip, and the boat owner’s number, last name, and first name.
d. For each possible service category, list the category number and description. In addition, for each service request in a category, list the marina number, and slip number for the boat receiving the service, the estimated hours for the service, the hours already spent on the service, and the next date that is scheduled for the particular service.
The following four tables form part of a library database:
• Book (isbn, title, author, genre, price)
• Copy (copyId, isbn)
• Loan (userId, copyId, loanDate, dueDate)
• User (userId, name, address, email)
Where:
• Book contains details of books and isbn is the primary key• Copy contains details of individual copies of books and copyId is the primary key• Loan contains details of loans and (userId, copyId, loanDate) forms the primary key • User contains details of library users and userId is the primary key
3.1 Identify the primary in the above schema.
3.2 Identify the foreign keys in the above schema.
3.3 Draw an Entity relationship model (ER-model) for the above schema, including:
• all attributes• correct notation for primary and foreign keys
• relationships• multiplicities
3.4 Draw sample tables for the above relations, ensuring relational integrity rules are met.
3.5 Explain the Entity Integrity constraint with reference to the Book relation.
Chapter 2 Solutions
A Guide to SQL
Ch. 2 - Prob. 1RQCh. 2 - What is an attribute?Ch. 2 - What is a relationship? What is a one-to-many...Ch. 2 - Prob. 4RQCh. 2 - What is a relation?Ch. 2 - Prob. 6RQCh. 2 - Prob. 7RQCh. 2 - How do you qualify the name of a field, and when...Ch. 2 - Prob. 9RQCh. 2 - What is a primary key? What is the primary key for...
Ch. 2 - Prob. 11RQCh. 2 - Prob. 12RQCh. 2 - Define second normal form. What types of problems...Ch. 2 - Define third normal form. What types of problems...Ch. 2 - Prob. 15RQCh. 2 - Prob. 16RQCh. 2 - List the changes you would need to make to your...Ch. 2 - Prob. 1TDCh. 2 - Prob. 2TDCh. 2 - Prob. 3TDCh. 2 - Prob. 4TDCh. 2 - Prob. 5TDCh. 2 - Prob. 1CATCh. 2 - Identify the functional dependencies in the...Ch. 2 - Prob. 3CATCh. 2 - Determine the functional dependencies that exist...Ch. 2 - Prob. 2SCGCh. 2 - Prob. 3SCG
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