Homework Help is Here – Start Your Trial Now!
Engineering
Computer Science
Answer the following questions about the given statement: ∀t : Trainer • ∃c : course • (t,c) ∈ Teaches •What does this statement mean? •Is this statement a set or a predicate? •What does the statement evaluate to based on the current system state?

Answer the following questions about the given statement: ∀t : Trainer • ∃c : course • (t,c) ∈ Teaches •What does this statement mean? •Is this statement a set or a predicate? •What does the statement evaluate to based on the current system state?

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
See similar textbooks
icon
Related questions
Question
100%

Answer the following questions about the given statement:

∀t : Trainer • ∃c : course • (t,c) ∈ Teaches

•What does this statement mean?
•Is this statement a set or a predicate?
•What does the statement evaluate to based on the current system state?


This is for assignmnet 4, the Owner-Course, Trainer-Course association we name "Teaches" here to keep it simpler. Teaches association between Owner/Teacher and Course Gym Owner : Owner name = GymOwner email gymowner@gym.com password = gymowner Trainer 1: Trainer name = Trainer1 email trainer1@gym.com password = trainer 1 credit = 3 Trainer 2 Trainer name = Trainer2 email trainer2@gym.com password = trainer2 credit = 2 Wrestling Course time = 2 type = id = 1 private Wrestling false Boxing Course time = 2 type = id = 2 private false Boxing WeightLifting Course time = 2 type = Weightlifting id = 3 private = false Yogal: Course time = 3 type = id = 4 private = true Yoga Yoga2 Course time = 4 = type id = 5 private = false Yoga Customer 1: Customer Customer1 name = email = customer1@gym.com password = customer1 classcredit class credit 0 Customer 2 : Customer name = Customer2 email password = customer2 classcredit class credit = 1 = customer2@gym.com Customer 3 : Customer name = Customer3 email = customer3@gym.com = customer3 password classcredit class credit = 4 Customer 4 : Customer name = Customer4 email = customer4@gym.com password = customer4 classcredit class credit = 5 Customer 5 Customer name = Customer5 email = password = customer5 classcredit class credit = 1 customer5@gym.com Customer 6 : Customer name = Customer6 email password = customer6 classcredit class credit = 10 = customer6@gym.com Customer 7 : Customer Books association between Course and Customer name = Customer7 email = customer7@gym.com password = customer7 classcredit class credit = 2
Transcribed Image Text:This is for assignmnet 4, the Owner-Course, Trainer-Course association we name "Teaches" here to keep it simpler. Teaches association between Owner/Teacher and Course Gym Owner : Owner name = GymOwner email gymowner@gym.com password = gymowner Trainer 1: Trainer name = Trainer1 email trainer1@gym.com password = trainer 1 credit = 3 Trainer 2 Trainer name = Trainer2 email trainer2@gym.com password = trainer2 credit = 2 Wrestling Course time = 2 type = id = 1 private Wrestling false Boxing Course time = 2 type = id = 2 private false Boxing WeightLifting Course time = 2 type = Weightlifting id = 3 private = false Yogal: Course time = 3 type = id = 4 private = true Yoga Yoga2 Course time = 4 = type id = 5 private = false Yoga Customer 1: Customer Customer1 name = email = customer1@gym.com password = customer1 classcredit class credit 0 Customer 2 : Customer name = Customer2 email password = customer2 classcredit class credit = 1 = customer2@gym.com Customer 3 : Customer name = Customer3 email = customer3@gym.com = customer3 password classcredit class credit = 4 Customer 4 : Customer name = Customer4 email = customer4@gym.com password = customer4 classcredit class credit = 5 Customer 5 Customer name = Customer5 email = password = customer5 classcredit class credit = 1 customer5@gym.com Customer 6 : Customer name = Customer6 email password = customer6 classcredit class credit = 10 = customer6@gym.com Customer 7 : Customer Books association between Course and Customer name = Customer7 email = customer7@gym.com password = customer7 classcredit class credit = 2
Expert Solution
steps

Step by step

Solved in 3 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Decision Making Process
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Database System Concepts
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
Starting Out with Python (4th Edition)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
Digital Fundamentals (11th Edition)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
C How to Program (8th Edition)
C How to Program (8th Edition)
Computer Science
ISBN:
9780133976892
Author:
Paul J. Deitel, Harvey Deitel
Publisher:
PEARSON
Database Systems: Design, Implementation, & Manag…
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781337627900
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Computer Science
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
SEE MORE TEXTBOOKS