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Una base de datos relacional es una colecci\u00f3n de elementos de datos organizados en un conjunto de tablas formalmente descritas desde la que se puede acceder a los datos o volver a montarlos de muchas maneras diferentes sin tener que reorganizar las tablas de la base.<\/p>\n

La base de datos relacional fue inventada por E.F. Codd en IBM en 1970.<\/p>\n

La interfaz est\u00e1ndar de programa de usuario y aplicaci\u00f3n a una\u00a0base de datos\u00a0relacional es el\u00a0lenguaje de consultas estructuradas (SQL).<\/p>\n

Los comandos de SQL se utilizan para:<\/p>\n