Library is an important facility for each university.

1. Identify at least four entities you want to recorder information for.
2. Define attributes for these entities.
3. Draw a simple ER for the identified entities.
4. Define primary keys for the entities and specify how to link these entities.
5. Why somebody may prefer derived attributes over the actual attributes?

Other themes

6. If you have a functional dependency XY for some relation R, can we consider X or Y a primary key for R? Justify your answer.
7. If a relation R has many functional dependencies that hold, does this mean that R is badly designed?