Technical Report CS0687

TR#:CS0687
Class:CS
Title: UPDATE LANGUAGES vs. QUERY LANGUAGES
Authors: R.A. Hasson and J.A. Makowsky
PDF - RevisedCS0687.revised.pdf
Abstract: Update languages and query languages for relational databases have attracted considerable attention. In this paper, we define the precise notions of {\em computable} (deterministic/non-deterministic) queries and updates for the relational data model, and we show a relationship between them. We describe some complete relational database languages, and point out a relationship between complete query and update languages that can be applied to any data model.
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