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31 Δεκ 2012 · In this chapter, Section 1 provides an introduction, including the evolution of various database systems, data models, and the emergence of multidatabase systems and their importance.
In ancient times, elaborate database systems were developed by government offices, libraries, hospitals, and business organizations, and some of the basic concepts and principles used in building those systems are still being used today.
Databases have existed for centuries: the maintenance of records and data has evolved from engravings to cards to digital storage. The history of databases gives us a view of the evolution of database models and the problems of each model.
A Brief History of Database Systems - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Database systems have evolved over several generations from early flat-file systems to relational and object-relational systems.
Origins of the database go back to libraries, governmental, business and medical records before the computers were invented. And back to 1960’s, two main data models were developed - network model CODASYL (Conference on Data System Language) and hierarchical model IMS (Information Management System).
DATABASE SYSTEMS: A BRIEF TIMELINE. Event Consequence Pre-1960s. 1945 Magnetic tapes developed (the first medium to allow searching). Replaced punch cards and paper tape. 1957 First commercial computer installed. 1959 McGee proposed the notion of generalized access to electronically stored data. 1959 IBM introduced the Ramac system.
We start with a presentation of central ideas and foundations of database systems. After tracing the database systems' evolution, we briefly ex plore the background, characteristics, advantages and disadvantages of the main database models: hierarchical, network, relational, and object-oriented.
