IBM started working on a prototype system loosely based on Codd's concepts as System R in the early 1970s. The first version was ready in 1974/5, and work then started on multi-table systems in which the data could be split so that all of the data for a record (some of which is optional) did not have to be stored in a single large "chunk". Subsequent multi-user versions were tested by customers in 1978 and 1979, by which time a standardized query language – SQL[citation needed] – had been added. Codd's ideas were establishing themselves as both workable and superior to CODASYL, pushing IBM to develop a true production version of System R, known as SQL/DS, and, later, Database 2 (DB2).
IBM started working on a prototype system loosely based on Codd 's concepts as System R in the early 1970s . The first version was ready in 1974/5 , and work then started on multi - table systems in which the data could be split so that all of the data for a record ( some of which is optional ) did not have to be stored in a single large " chunk " . Subsequent multi - user versions were tested by customers in 1978 and 1979 , by which time a standardized query language – SQL[citation needed ] – had been added . Codd 's ideas were establishing themselves as both workable and superior to CODASYL , pushing IBM to develop a true production version of System R , known as SQL / DS , and , later , Database 2 ( DB2 ) .
What is the system IBM created using Codd's research?
What is the system IBM created using Codd 's research ?
System R
System R