Database Systems: Design, Implementation, & Management
11th Edition
ISBN: 9781285196145
Author: Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher: Cengage Learning
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Expert Solution & Answer
Chapter 5, Problem 5P
Explanation of Solution
Crow’s Foot ER diagram for Tiny College:
The following data model shows the solution for the given question.
Explanation:
- In the above data model, the overlapping constraint (o) is used as a category symbol. Here the “Employee” supertype entity has optional subtype entity.
- The “Professor” and “School” are the current data entities which mean the user can get the data from the current
database ...
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CHAPTER 9
Using cardinalities shown in the partial ER diagram, name the Foreign Key(s) (FK) that should be placed into the respective tables. If no foreign key is required in a table, then indicate NONE. Add any table(s) and Keys that may be needed
Please answer below questions based on this dimensional model and additional information provided
Q1: What is the maximum possible fact data volume in terms of record/row count?
Answer:
Q3: The m:n ratio from attribute B3 to attribute B4 is changed from 1:3 to 1:1 due to some organizational changes. By how many times the maximum possible fact data volume (by record count) decreases?
Answer:
Q4: If there is an aggregate fact table at quarter dimension level with other attributes B4, C5 and A3. What is the maximum possible record count of this aggregate table as per the current state mentioned above?
Answer:
Closely examine the following tables and use it to answer the questions that follow:
department
course
student_type
student_category
Student
registration
registration_type
Suppose that the following are true:
- all id column are primary keys in whichever table they are
- the dept_id in course table is foreign key that is referencing the id column in the department table
- the foreign keys stud_type_id, stud_cat_id in the student table are referencing the id columns
in the student_type and student_category tables respectively.
- the coursecode and stud_id columns in the registration table are foreign keys in the course
and student tables respectively.
1. Design an Entity Relationship Diagram for the system above.
2. Write query that would return the names and contacts of all Local students.
3. Write a query that would return names, contact and locations of all departments that has a
location text with Ave 3 as part of it. [hint: use the LIKE clause with “_” or “%”]
4. What would…
Chapter 5 Solutions
Database Systems: Design, Implementation, & Management
Ch. 5 - Prob. 1RQCh. 5 - What kinds of data would you store in an entity...Ch. 5 - Prob. 3RQCh. 5 - What is a subtype discriminator? Give an example...Ch. 5 - Prob. 5RQCh. 5 - What is the difference between partial...Ch. 5 - Prob. 7RQCh. 5 - According to the data model, is it required that...Ch. 5 - Prob. 9RQCh. 5 - Prob. 10RQ
Ch. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - When implementing a 1:1 relationship, where should...Ch. 5 - What is time-variant data, and how would you deal...Ch. 5 - Prob. 16RQCh. 5 - Prob. 1PCh. 5 - Prob. 2PCh. 5 - Prob. 3PCh. 5 - Prob. 4PCh. 5 - Prob. 5PCh. 5 - Prob. 6PCh. 5 - Prob. 7PCh. 5 - Prob. 8CCh. 5 - Prob. 9CCh. 5 - Prob. 10C
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