Exercise 1

1. Identify some informal queries and update operations that you would expect to apply to the database shown in Figure 1.2

2. What is the difference between controlled and uncontrolled redundancy?

3. Specify all the relationships among the records of the database shown in Figure 1.2

4. Cite some examples of integrity constraints that you think can apply to the database shown in Figure 1.2.

5.  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.

6.  Can you restructure the columns in COURSE, SECTION, and PREREQUISITE tables so that only one column will need to be updated?