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Introduction to Relational Databases




Relational databases are probably the most common type of database used for general-purpose tasks. In a relational database, information is grouped according to its type, generally in tables (see below). For example, in a database designed to hold fleet information you may include a table of employees and a table of vehicles. – In addition [...]



Introduction to Distributed Database Systems




A distributed database appears to a user as a single database but is, in fact, a set of databases stored on multiple computers. The data on several computers can be simultaneously accessed and modified using a network. Each database server in the distributed database is controlled by its local DBMS, and each cooperates to maintain [...]



Introduction To Data Warehousing




A data warehouse is a type of computer database that is responsible for collecting and storing the information of a particular organization. The goal of using a data warehouse is to have an efficient way of managing information and analyzing data. In addition to a relational database, a data warehouse environment includes an extraction, transportation, [...]



DBMS Three-Schema Architecture and Data Independence




WHAT IS DBMS ? – To be able to carry out operations like insertion, deletion and retrieval, the database needs to be managed by a substantial piece of software; this software is usually called a Database Management System(DBMS). – A DBMS is usually a very large software package that enables many different tasks including the [...]