There are three intertwined themes in this chapter. First, we introduce you to the design of information structures using the relational model. We shall see that. Tables of information, …

Relational Model is basis for most DBMSs, e.g., Oracle, Microsoft SQL Server, IBM DB2, Sybase, PostgreSQL, MySQL, . . . Typically used in conceptual design: either directly (creating tables …

Consider a database table that contains first name, last name, and age of a person. Which of the following statements is correct? Consider a database table that has 3 attributes: The course …

Referential integrity constraints are implemented with foreign key to primary key references. 1. You Try... Primary key on the one side becomes a foreign key on the many side (Fig. 4-12). …

This chapter will focus on the basic concepts of how data is stored and retrieved in a relational database by a relational DBMS.

Cartesian Product in Relational Algebra What it does: takes two relations, R1 and R2, and forms a new relation containing all possible combinations of tuples from R1 with tuples from R2

Relational Database Model Well-Structured Relation A relation that contains a minimum amount of redundancy and allows users to insert, modify and delete the rows without errors or …