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
Towards a Unified Query-by-Example (UQBE): UML as a Basis for a Generic Graphical Query Language
Proceedings of the International Symposium on Objects and Databases
Designing Triggers with Trigger-By-Example
Knowledge and Information Systems
Fundamental and secondary issues in the design of non-procedural relational languages
VLDB '79 Proceedings of the fifth international conference on Very Large Data Bases - Volume 5
ER'00 Proceedings of the 19th international conference on Conceptual modeling
An overview of recent data base research
ACM SIGMIS Database
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The problem of the translation and compatibility of high level data base query languages is addressed via a case study of the languages SEQUEL and Query by Example. In particular, an algorithm for translating queries on a relational data base stated in Query by Example into queries expressed in SEQUEL is introduced. This algorithm is used as a vehicle to describe a consistent interpretation of the semantics of SEQUEL and Query by Example. The compatibility of Query by Example and SEQUEL is briefly discussed. Examples of the operation of the algorithm are presented.