A Guide to SQL
A Guide to SQL
9th Edition
ISBN: 9781337668880
Author: Pratt
Publisher: Cengage
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Chapter 2, Problem 11RQ

Explanation of Solution

Functional dependencies:

Functional dependency is a term in the relational database theory which refers to a constraint that is located in between the two sets of attributes in a relation from a database. The functional dependencies are as follows...

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.

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