System R: relational approach to database management
ACM Transactions on Database Systems (TODS)
Principles of Database Systems
Principles of Database Systems
SEQUEL: A structured English query language
SIGFIDET '74 Proceedings of the 1974 ACM SIGFIDET (now SIGMOD) workshop on Data description, access and control
A critique of the SQL database language
ACM SIGMOD Record
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This paper describes an implementation of the relational database management system, OMEGA. OMEGA is designed to be "query language independent" in order to promote the investigation of experimental query languages by graduate students. OMEGA also supports the query language SQL and as such, is used in undergraduate database courses to demonstrate the features of SQL.