Hugh Darwen — era empleado de IBM Reino Unido de 1967 al 2004, ha estado involucrado en la historia de modelo relacional desde sus inicios. De 1978 a 1982 fue un arquitecto principal de Bussines System 12 , un sistema de gestión de datos que estaba fielmente… … Wikipedia Español
The Third Manifesto — (1995) is Christopher J. Date s and Hugh Darwen s proposal for future relational database management systems that would avoid Object Relational Impedance Mismatch between object oriented programming languages and RDBMSs by fully supporting all… … Wikipedia
D (data language specification) — D is a set of requirements for what Christopher J. Date and Hugh Darwen believe a relational database query language ought to be like. It is proposed in their book The Third Manifesto. Contents 1 Overview 2 Tutorial D 3 Implementations … Wikipedia
Christopher J. Date — Chris Date Born 1941 (age 69–70) Watford, England Nationality UK Alma mater University of Cambridge Occupation author, lecturer, researcher, and consultant, specializing in rela … Wikipedia
First normal form — (1NF or Minimal Form) is a normal form used in database normalization. A relational database table that adheres to 1NF is one that meets a certain minimum set of criteria. These criteria are basically concerned with ensuring that the table is a… … Wikipedia
Primera forma normal — La primera forma normal (1FN o forma mínima) es una forma normal usada en normalización de bases de datos. Una tabla de base de datos relacional que se adhiere a la 1FN es una que satisface cierto conjunto mínimo de criterios. Estos criterios se… … Wikipedia Español
Database normalization — In the design of a relational database management system (RDBMS), the process of organizing data to minimize redundancy is called normalization. The goal of database normalization is to decompose relations with anomalies in order to produce… … Wikipedia
Null (SQL) — The Greek lowercase omega (ω) character is used to represent Null in database theory. Null is a special marker used in Structured Query Language (SQL) to indicate that a data value does not exist in the database. Introduced by the creator of the… … Wikipedia
David McGoveran — is a consultant, researcher, lecturer, and industry analyst to the software industry; author of numerous books and articles in the fields of relational databases, transaction processing, business intelligence, business process management,… … Wikipedia
Christopher Date — Christopher J. Date (nació en 1941) es autor, conferencista, investigador y consultor independiente, especializado en la tecnología de bases de datos relacionales. Es el investigador principal del modelo relacional de bases de datos de Edgar F.… … Wikipedia Español