A database management system (DBMS) is the technology for creating and managing databases. DBMS is a software tool to organize (create, retrieve, update, and manage) data in a database. A datum is a unit of data. Meaningful data combined to form information. Hence, information is interpreted data - data provided with semantics. The main aim of a DBMS is to supply a way to store up and retrieve database information that is both convenient and efficient. By data, we mean known facts that can be recorded and that have embedded meaning.

This book is about the different types of database management systems and security issues of databases and networks. We will take the Oracle database to elaborate with a detailed discussion on the base of RDBMS and other databases like NoSql, Mobile database, and open-source database. Oracle has transformed the landscape of data management to a very high standard. By itself, Oracle uses database tables to store any structured and unstructured data. However, it also stored a set of codes with business logic in the form of a trigger, procedure, function, etc. While this is a unique advantage,...