Exercises

Answer the following questions.

Explain the difference between a table schema and a table.

What is the main organizational unit of a relational database.

What is a relational database schema.

Explain the role of a primary key in a table.

Explain how a foreign key can be used to link two tables.

Briefly explain the following integrity rules:

   a. Key Integrity.
   b. Entity Integrity.
   c. Referential Integrity.