1. Assignment #1
Instruction for properly completing the assignment:
Due Sunday of Week 1 by 11:55 PM [5% of your grade]
Download the attached template called "INFO620-
Assignment1_LastNameFirst.doc".
Change the file name applying your Last Name and First Name
in place of the LastNameFirst.
Then open the newly saved file and enter your name and the
date due on the top of the document.
Then enter each problem's solution within this same file in their
proper locations WITHOUT changing or erasing the questions.
Support your responses and answers by references from the text.
Review and complete all questions.
Then upload to Assignment #1 area of the Assignments.
Your grade may be reduced if these instructions are NOT
followed closely.
Week 1 Assignment Grading Rubric:
#1.9
0.2 points
#3.13
0.3 points
#4.12a
0.2 points
#1.10
0.2 points
#3.16
0.3 points
#4.12b
0.2 points
#1.12
0.2 points
#3.19a
0.2 points
#4.12c

2. 0.2 points
#1.13
0.2 points
#3.19b
0.2 points
#4.12d
0.2 points
#1.14a
0.2 points
#3.19c
0.2 points
#4.12e
0.2 points
#1.14b
0.2 points
#3.19d
0.2 points
#4.12f
0.2 points
#2.14
0.3 points
#3.20
0.3 points
#4.15a
0.2 points
#2.15
0.3 points
#4.14b
0.1 points
Here are the contents of Assignment #1 (however - please use
the template attached - don't copy and paste from here):
CH1: DATABASES AND DATABASE USERS
#1.9

3. - What is the difference between controlled and uncontrolled
redundancy?
#1.10
- Specify all the relationships among the records of the database
shown in Figure 1.2.
#1.12
– Cite some examples of integrity constraints that you think can
apply to the database shown in Figure 1.2.
#1.13
- Give examples of systems in which it may make sense to use
traditional file processing instead of a database approach.
#1.14
- Consider Figure 1.2.
a.
If the name of the ‘CS’ (Computer Science) Department changes
to ‘CSSE’ (Computer Science and Software Engineering)
Department and the corresponding prefix for the course number
also changes, identify the columns in the database that would
need to be updated.
b.
Can you restructure the columns in COURSE, SECTION, and
PREREQUISITE tables so that only one column will need to be
updated?
CH 2: DATABASE SYSTEM CONCEPTS AND
ARCHITECTURE
#2.14
- if you were designing a Web-based system to make airline

4. reservations and to sell airline tickets, which DBMS
Architecture would you choose from Section 2.5? Why? Why
would the other architectures not be a good choice?
#2.15
- Consider Figure 2.1. In addition to constraints relating the
values of columns in one table to columns in another table,
there are also constraints that impose restrictions on values in a
column or a combination of columns within a table. One such
constraint forces that a column or a group of columns must be
unique across all rows in the table. For example, in the
STUDENT table, the StudentNumber column must be unique (to
prevent two different students from having the same
StudentNumber). Identify the column or the group of columns in
the other tables that must be unique across all rows in the table?
CH 3: THE RELATIONAL DATA MODEL AND
RELATIONAL DATABASE CONSTRAINTS
#3.13
- Consider the relation CLASS(Course#, Univ_Section#,
InstructorName, Semester, BuildingCode, Room#, TimePeriod,
Weekdays, CreditHours). This represents classes taught in a
university with unique Univ_Section#. Give what you think
should be various candidate keys and
#3.16
- Consider the following relations for a database that keeps
track of student enrollment in courses and the books adopted for
each course:
STUDENT (
SSN
, Name, Major, Bdate)
COURSE (
Course#
,

5. Quarter
, Grade)
ENROLL (SSN,
Course#
,
Quarter
, Grade)
BOOK_ADOPTION (
Course#
,
Quarter
, Book_ISBN)
TEXT (
Book_ISBN
, Book_Title, Publisher, Author)
Specify the foreign keys for this schema, stating any
assumptions you make.
#3.19
- Consider a STUDENT relation in a UNIVERSITY database
with the following attributes (Name, SSN, Local_phone,
Address, Cell_phone, Age, GPA). Note that the cell phone may
be from a different city and state (or province) from the local
phone. A possible tuple of the relation is shown below:
Name
SSN
LocalPhone
Address
CellPhone
Age
GPA
George Shaw William Edwards
123-45-6789

6. 555-1234
123 Main St., Anytown, CA 94539
555-4321
19
3.75
a.
Identify the critical missing information from the LocalPhone
and CellPhone attributes as shown in the example above. (Hint:
How do call someone who lives in a different state or
province?)
b.
Would you store this additional information in the LocalPhone
and CellPhone attributes or add new attributes to the schema for
STUDENT?
c.
Consider the Name attribute. What are the advantages and
disadvantages of splitting this field from one attribute into three
attributes (first name, middle name, and last name)?
d.
What general guideline would you recommend for deciding
when to store information in a single attribute and when to split
the information.
#3.20
- Recent changes in privacy laws have disallowed organizations
from using SSN to identify individuals unless certain
restrictions are satisfied. As a result, most US universities

7. cannot use SSNs as primary keys (except for financial data). In
practice, StudentID, a unique ID, a unique identifier, assigned
to every student, is likely to be used as the primary key rather
than SSN since StudentID is usable across all aspects of the
system. Reference the entire problem in the text
CH 4: Basic SQL
#4.12
- Specify the following queries in SQL on the database schema
of Figure 1.2.
a)
Retrieve the names of all senior students majoring in 'COSC'
(computer science).
b)
Retrieve the names of all courses taught by professor King in 85
and 86.
c)
For each section taught by professor King, retrieve the course
number, semester, year, and number of students who took the
section.
d)
Retrieve the name and transcript of each senior student
(Class=5) majoring in COSC. Transcript includes course name,
course number, credit hours, semester, year, and grade for each
course completed by the student.
e)

8. Retrieve the names and major departments of all straight A
students (students who have a grade of A in all their courses).
f)
Retrieve the names and major departments of all students who
do not have any grade of A in any of their courses.
#4.15
- Consider the EMPLOYEE table’s constraint EMPSUPERFK as
specified in Figure 4.2 is changed to read as follows:
CONSTRAINT EMPSUPERFK
FOREIGN KEY (SUPERSSN) REFERNCES EMPLOYEE(SSN)
ON DELETE CASCADE ON UPDATE CASCADE,
Answer the following questions:
a.
What happens when the following command is run on the
database state shown in Figure 5.6?
DELETE EMPLOYEE WHERE LNAME = ‘Borg’
b.
Is it better to CASCADE or SET NULL in case of
EMPSUPERFK constraint ON DELETE?