CGS2541
Instructor: Meg McManus
Homework Assignment 8
Chapter 8
1.
(4 points)
When is an outer join used instead of a natural join?
2.
(4 points)
Explain the processing order of a correlated subquery.
3.
(5 points)
Under what conditions can a UNION clause be used?
4.
(12 points, 3 points ea)
List four advantages of SQL-invoked routines.
5.
(15 points, 5 points ea)
The following are based on the class schedule ERD depicted in Figure
4-6 in Chapter 4 and the 3NF relations along with some sample data
are repeated in Figure 8-8. For each, draw the expected Results.
(Hint: The easiest method would be to create the Results tables in
Excel and copy them into Word.)
Write SQL retrieval commands for each of the following queries:
a.
Display the course ID and course name for all courses with an
ISM prefix.
b.
Display all courses for which Professor Berndt has been
qualified.
c.
Display the class roster, including student name, for all
students enrolled in section 2714 of ISM 4212.
6.
(25 points, 5 points ea)
Write an SQL query to answer the following questions:
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CGS2541
a.
b.
c.
d.
e.
7.
Instructor: Meg McManus
Which instructors are qualified to teach ISM 3113?
Is any instructor qualified to teach ISM 3113 and not qualified
to teach ISM 4930?
How many students are enrolled in section 2714 during
semester I-2004?
How many students are enrolled in ISM 3113 during semester I2004?
Which students were not enrolled in any courses during
semester I-2004?
(35 points, 5 points ea)
The following are based on the entire Pine Valley Furniture database.
You can use Microsoft Access or Oracle 9i for your answers.
Write an SQL command to:
a.
display the order number, customer number, order date, and
items ordered for Order #1001.
b.
display each item ordered for Order #1001, its standard price,
and the total price for each item ordered.
c.
total the cost of Order #1001. (You need the answer to b for
this one.)
d.
find any customers who have not placed orders.
e.
produce a list of all the products and the number of times each
product has been ordered.
f.
display customer number, name, and order number for all
customers and their orders.
g.
list the order number and order quantity for all customer
orders for which the order quantity is greater than the average
order quantity of that product. (Hint: This involves a correlates
subquery.)
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