Edgar F. Codd

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Edgar Frank "Ted" Codd (born August 19, 1923 on the Isle of Portland , Dorset , England, † April 18, 2003 on Williams Island , Florida) was a British mathematician and database theorist.


Codd was the youngest of seven children of a Lederer and a teacher. He studied at Exeter College of Oxford University mathematics and chemistry. During the Second World War he was with the Royal Air Force and received flight lessons in the USA. In 1948 he moved to this. He was briefly a lecturer in mathematics at the University of Tennessee and from 1949 worked as a mathematical programmer in the New York headquarters of IBM , where he first programmed for the Selective Sequence Electronic Calculator and then developed the multitasking concept for the IBM 7030 Stretch . He received his doctorate from the University of Michigan in 1965 with an IBM scholarship and moved to the IBM Almaden Research Center in San José in 1967 .

Codd created the relational model in the 1960s and 1970s , which is the basis of the relational databases that are still a standard in database technology today. He was significantly involved in the development of the R system . It is (next to Ingres ) of the first prototype of a relational database management system and the query language used SEQUEL ( S tructured E nglish Que ry L anguage) from which the SQL query language emerged. The later IBM products based on System R SQL / DS and DB2 and the database Oracle .

With Raymond F. Boyce , Codd also developed the Boyce-Codd normal form . He also formulated twelve evaluation rules as a list of requirements for an online analytical processing system (OLAP).

In 1984 Codd retired from IBM and founded the Codd and Date Consulting Group with Chris J. Date , where he worked as a consultant until 1999.

For his ongoing work in the field of databases , Codd received the Turing Award in 1981 , which is considered the highest honor in computer science . In 1974 he became a Fellow of the British Computer Society and in 1976 an IBM Life Fellow. In 1994 he was elected to the American Academy of Arts and Sciences .

Codd was married twice and had four children.


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