OVERVIEW OF RELATIONAL DATABASES.

Abstract

SQL/DS and DB2 are both Relational Data Base Management Systems. This paper introduces relational databases. A RELATIONAL DATA BASE is one in which the data is perceived by the user as a collection of tables. This tabular view of data is easy to understand. Tables in a relational data base are related dynamically through the values of the information in them. Part of the power and flexibility of a relational data base management system is this ability to relate information dynamically and not to have predefined it into the data structure.