Relational Database Management System

Definition: Relational Database Management System

Relational Database Management System

Noun

1. A database management system designed to manage a relational database.

Specialty Definitions: Relational Database Management System

Domain	Definitions
Computing	Relational database management system relational database. Source: The Free On-line Dictionary of Computing.
Source: compiled by the editor from various references; see credits.

Specialty Definition: Relational database management system

A relational database management system is a database management system that is based on the relational model as introduced by Edgar F. Codd. Strictly speaking it should also satisfy Codd's 12 rules but in practice there is no DBMS that satisfies all these rules. In fact, most succesful DBMSs (and the query language SQL) that are considered to be relational violate the relational model in several important ways. However, most database practitioners and researchers use the term in a loose way such that most databases that support SQL are also included.

The first released RDBMS that was a relatively faithful implementation of the relational model was the Multics Relational Data Store, first sold in 1978. Others have been Berkeley Ingres QUEL and IBM BS12.

Today, popular commercial RDBMS's for large databases include Oracle, Microsoft SQL Server, Sybase SQL Server, and IBM's DB2. The most commonly used free RDBMS's are MySQL and PostgreSQL.

Links

http://www.dbdebunk.com argues that it is important that the predicate relational should be reserved for those DBMSs that are fully faithful to the relational model. However, this is not common practice.

Commercial Usage: Relational Database Management System

Domain	Title
Books	A Guide to Ingres: A User's Guide to the Ingres Product (A Relational Database Management System With Built-In Application Development Facilities F) (reference) (more book examples)
Source: compiled by the editor from various references; see credits.

Frequency of Internet Keywords: Relational Database Management System

Alternative Orthography: Relational Database Management System

Hexadecimal (or equivalents, 770AD-1900s) (references)

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Leonardo da Vinci (1452-1519; backwards) (references)

Binary Code (1918-1938, probably earlier) (references)

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HTML Code (1990) (references)

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ISO 10646 (1991-1993) (references)

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Encryption (beginner's substitution cypher): (references)

Relational Database Management System

Definition: Relational Database Management System