• Submitted By: woshilixu
  • Date Submitted: 10/13/2011 10:48 PM
  • Category: Business
  • Words: 654
  • Page: 3
  • Views: 341

A is an organized collection of data for one or more purposes, usually in digital form. The data are typically organized to model relevant aspects of reality (for example, the availability of rooms in hotels), in a way that supports processes requiring this information (for example, finding a hotel with vacancies).

This definition is very general, and is independent of the technology used. The term "database" sometime refers both to the way its users view it, and to the logical and physical materialization of its data, content, in files, computer memory, and computer data storage. (Sometime distinction between a database object and database system is helpful).

Not every collection of data is a database; the term database implies that the data is managed to some level of quality (measured in terms of accuracy, availability, usability, and resilience) and this in turn often implies the use of a general-purpose Database management system (DBMS).

A general-purpose DBMS is typically software system that meets many usage requirements, and the databases that it maintains are often large and complex. The utilization of databases is now spread to such a wide degree that virtually every technology and product relies on databases and DBMSs for its development and commercialization, or even may have such embedded in it. Also, organizations and companies, from small to large, heavily depend on databases for their operations.

The term database is correctly applied to the data and their containing data structures, and not to the DBMS which is a software system used to manage the data. The structure of a database is generally too complex to be handled without its DBMS, and any attempt to do otherwise is very likely to result in database corruption. DBMSs are packaged as computer software products: well-known and highly utilized products include the Oracle DBMS, Access and SQL Server from Microsoft, DB2 from IBM and the Open source DBMS MySQL. Each such DBMS product...

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