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
Suppose we have a database for an university.
The requirements are as follows:
• Professors have an SSN, a name, an age, a rank, and a research specialty.
• Projects have a project number, a sponsor name (e.g., NSF), a starting date, an ending date, and a budget.
• Graduate students have an SSN, a name, an age, and a degree program (e.g., M.S. or Ph.D.).
• Each project is managed by one professor (known as the project’s principal investigator). • Each project is worked on by one or more professors (known as the project’s co-investigators).
• Professors can manage and/or work on multiple projects.
• Each project is worked on by one or more graduate students (known as the project’s research assistants).
• When graduate students work on a project, a professor must supervise their work on the project. Graduate students can work on multiple projects, in which case they will have a (potentially different) supervisor for each one.
The FDs for the above requirements are given as,
• PSSN →…
Suppose you are given the following requirements for a simple database for the National Hockey League (NHL):- the NHL has many teams,- each team has a name, a city, a coach, a captain, and a set of players,- each player belongs to only one team,- each player has a name, a position (such as left wing or goalie), a skill level, and a setof injury records,- a team captain is also a player,- a game is played between two teams (referred to as host_team and guest_team) andhas a date (such as May 11th, 2017) and a score (such as 4 to 2).Construct the ER diagram for the NHL database using the Crows Foot notation.
So I have this HW question.....
"Suppose you are given the following requirements for a simple database for the National Football League (NFL):
the NFL has many teams,
each team has a name, a city, a coach, a captain, and a set of players,
each player belongs to only one team,
each player has a name, a position (such as left wing or goalie), a skill level, and a set of injury records, · a team captain is also a player,
a game is played between two teams (referred to as Home Team and Guest team) and has a date (such as May 11th, 1999) and a score (such as 4 to 2)"
And managed to seperate the attributes & entities into this:
Team
Name
City
Coach
Captain(referenced from Player(Name))
Set of Players
Player
Name
Position
Skill Level
Set of Injury Records
Team (to which the player belongs referenced from Team(Name))
Injury Record
Player (to whom the record belongs referenced from Player(Name))
Injury Type
Injury Date
Recovery Date
Game
Home Team
Guest Team
Date
Score…
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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