- Start
- Jun 30, 197050% CONFIDENCEfrom the source
Codd Publishes A Relational Model of Data for Large Shared Data Banks
- "A Relational Model of Data for Large Shared Data Banks" by E. F. Codd of the IBM Research Laboratory ran in Communications of the ACM, volume 13, number 6, June 1970[1]
- It proposed representing all data as tuples grouped into relations, with a structure and language consistent with first-order predicate logic[2]
- The point was a declarative method for specifying data and queries: users state what the database contains and what they want, not how to get it[2]
- Codd won the 1981 ACM Turing Award for the work, and later published his 12 rules defining what counts as a relational database[3]
- The pin is placed at IBM's Almaden Research Center, the successor to the San Jose research laboratory named on the paper[3]
References 375% CONFIDENCE
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]50%seas.upenn.edu/~zives/03f/cis550/codd.pdfseas.upenn.edu· Posted Sep 22, 2026· Starts Jun 30, 1970 ✓· 33% of score
The paper's own header gives the issue and no day: Communications of the ACM, "Volume 13 / Number 6 / June, 1970". A month with no day is estimated at that month's last day.
- [2]90%Relational modelen.wikipedia.org· Added Sep 22, 2026· 33% of score
Describes the model the paper proposed - "an approach to managing data using a structure and language consistent with first-order predicate logic... where all data are represented in terms of tuples, grouped into relations" - and its purpose, "to provide a declarative method for specifying data and queries".[1]
- [3]85%Edgar F. Codden.wikipedia.org· Added Sep 22, 2026· 33% of score
The author's article: "a British computer scientist who, while working for IBM, invented the relational model for database management, the theoretical basis for relational databases", and winner of the 1981 ACM Turing Award.[1]
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