A relational language with deductions,functions and recursions |
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| Authors: | S Misbah Deen |
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| Affiliation: | PRECI Database Research Project, Department of Computing Science, University of Aberdeen, Aberdeen, United Kingdom |
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| Abstract: | We propose here a .relational algebra capable of deducing tuples from a premise expressed in an extended relational form: it also supports user-defined and recursive functions in the form of parameterised views, and provides a facility for easier specification of queries. The paper shows the power of the language in dealing with problems such as ancestors, part explosions and connected tours.This language, called DEAL, is an enhanced version of the PRECI Algebraic Language (PAL) but presented here in a SQL-like syntax. |
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| Keywords: | Deductive queries deductive relational languages deductive databases intelligent database queries |
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