The research paper different aspects of database technology, existing models of database management and their advantages compared to traditional way of data processing. The research paper also makes a review of the most popular DBMS and their characteristic features. It also discusses different aspects of storing images in the databases.
The primary purpose of computers was only number processing. Later the file systems were introduced for data processing and processing of different sorts of information (with a relatively simple data structure) which were supported only by system programs.
The development and improvement of computer technologies allowed the evolution of automated information systems as they required additional resources such as larger volumes of RAM , bigger storage devices, etc.
Information system is a program complex for a reliable data storing and processing with a relatively complicated structure as it should have a visual and comfortable user's interface. Information systems differ from the file system as they allow the following features:
Database Management Systems (DBMS) are the applied informational systems for management and processing of structured information. Such systems began to appear in late 60s. Modern DBMS are data information systems which support dynamic information model of a complicated controlled object: they allow to input, output, refresh and process data and also allow collective access to data. "Today's DBMS do not require data duplication and don't require frequent reorganization of data files" (Ambrosio,1989)
As Elmasri, R., and Navathe, S. state in their work Fundamentals of Database Systems , DBMS have the features which allow several users to solve different tasks using the single dynamic information:
During the process of file creation the conditions of uniqueness are formed and data which will be inputted into the file has to satisfy these conditions;
Data description in the program doesn't depend on the description of the database in general, but is coordinated with database features and opportunities;
Data management as well all functions of storing, developing, inputting , outputting in the database and help-functions of the system are autonomous running processes which are connected to applied programs only by information.
Database Management System executes generalized inquiry function while specific inquires are formulated by user;
Data is relatively independent from the program which allows to change definition of data and structure of data without additional program compilation. (from Elmasri, 1994)
According to T. Dyck, the most widely used components in DBMS are the following :
Table. The main