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General-purpose DBMSs aim to meet the needs of as many applications as possible, which adds to the complexity.

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This article is concerned only with databases where the size and usage requirements necessitate use of a database management system.

Physically, database servers are dedicated computers that hold the actual databases and run only the DBMS and related software.

A relational database, more restrictively, is a collection of schemas, tables, queries, reports, views, and other elements.

Database designers typically organize the data to model aspects of reality in a way that supports processes requiring information, such as (for example) modelling the availability of rooms in hotels in a way that supports finding a hotel with vacancies.

Application programmers may use a wire protocol directly, or more likely through an application programming interface.

Database designers and database administrators interact with the DBMS through dedicated interfaces to build and maintain the applications' databases, and thus need some more knowledge and understanding about how DBMSs operate and the DBMSs' external interfaces and tuning parameters.

Computer scientists may classify database-management systems according to the database models that they support; the most popular database systems since the 1980s have all supported the relational model - generally associated with the SQL language.

Formally, a "database" refers to a set of related data and the way it is organized.

DBMSs may be built around a custom multitasking kernel with built-in networking support, but modern DBMSs typically rely on a standard operating system to provide these functions.

Since DBMSs comprise a significant market, computer and storage vendors often take into account DBMS requirements in their own development plans.

A database-management system (DBMS) is a computer-software application that interacts with end-users, other applications, and the database itself to capture and analyze data.

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