1. Databases surround us on the web and everyday life. Now that you have a clearer
idea of what database systems do, find two examples of web sites that you believe
are likely to use databases and discuss what kinds of data they might be storing, as
in the example answer.

*yahoo.com uses databases to store information about news, jobs, mail, money, people, food, shopping etc.
*main.uab.edu stores data about classes times, class days, class numbers, class descriptions etc.


2. Identify relationships. Suppose you are creating a database to help a university
keep track of its course offerings. You might have the following entities in your
database, since they are distinct items in real life that are related to each other in
important ways: course, classroom, professor, and department. In the space
below, draw an ER diagram with a box for each of these four entities and arrows
between the boxes labeled with the relationships they denote. (Don’t worry about
what fields each of these entities should have for now.) See the example ER
diagram in your textbook and in Part 1 of this lab.

*Pastor-->Ministers-->Deacons-->Members of the Church


3. Identify many-to-one relationships. For each of the relationships you diagrammed
above, which ones are many-to-one? Which ones are many-to-many? Indicate
the relationships by writing 1 or 8 at each end of the relationship arrows. If you
are not sure about whether a relationship is one-to-many or many-to-many,
explain why.

	*Members of the Church-->1 Pastor
	*Deacons-->8 Members of the Church

4. Identify entities. Suppose you are creating a database to keep track of a radio
station’s record collection. What are some of the entities your database might
include?
	
	*It might include different types of music, the artists, the title of the song,
	and the release dates

5. Query results and tables look very similar—like a set of tuples. How are query
results and tables different, however?

	*tables can cause redundancy
	*query is how information is extracted from the database and are very specific


(1) Which movies were released before 1980, ordered by year of release?
	The Wrong Man 1956,Psycho 1960,The Bad Sleep Well 1960,High and Low 1963,
	Dersu Uzala 1974 and Jaws 1975

(2) When were each of the Psycho movies released?
	1960 & 1998

(3) Which movies have titles that start with the letter R?
	Ran(Chaos) & Red

(4) Which directors have last names that start with the letter S?
	Steven Soderbergh

(5) Which movies were directed by directors who were born after 1955?
	The Children of Heaven, The Color of Paradise, Traffic, Cinema Paradise, & The Legend of 1900