Attribute based file organization in a paged memory environment
Communications of the ACM
A relational model of data for large shared data banks
Communications of the ACM
SEQUEL: A structured English query language
SIGFIDET '74 Proceedings of the 1974 ACM SIGFIDET (now SIGMOD) workshop on Data description, access and control
An approach to implementing a relational data management system
SIGFIDET '74 Proceedings of the 1974 ACM SIGFIDET (now SIGMOD) workshop on Data description, access and control
The relational and network approaches: Comparison of the application programming interfaces
SIGFIDET '74 Proceedings of the 1974 ACM SIGFIDET (now SIGMOD) workshop on Data description, access and control: Data models: Data-structure-set versus relational
Introduction and overview of the multics system
AFIPS '65 (Fall, part I) Proceedings of the November 30--December 1, 1965, fall joint computer conference, part I
Optimal implementation of conjunctive queries in relational data bases
STOC '77 Proceedings of the ninth annual ACM symposium on Theory of computing
Database Computers A Step Towards Data Utilities
IEEE Transactions on Computers
An overview of recent data base research
ACM SIGMIS Database
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Among the most important current concepts in data base technology is the relational model of data base management. The theory was introduced by Codd in 1970 and has since been expanded in a large number of articles by Codd, and other authors, for example. The relational concept models the user view of a data base. As a user view it offers many applications significant advantages over more traditional approaches such as that proposed by the CODASYL Data Base Task Group. Unfortunately some of the desirable properties of the relational model, and in particular the very important attribute called data independence, make the concept difficult to implement efficiently. This paper will describe an approach to solving one of the key implementation problems. The concepts discussed here have been embodied in an experimental system called DAMAS developed at the Massachusetts Institute of Technology. A complete discussion of DAMAS can be found in Reference 12.