Datalog Educational System The Datalog Educational System (DES) is a free, open-source, multiplatform, portable, Prolog-based implementation of a deductive database system. DES is the current implementation, which enjoys Datalo
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learn query Structured Query Language study Contextual Query language query language SQL query language full recursive evaluation declarative debugging advanced query language Learn SQL Object Query Language Structure Query Language

Datalog Educational System Description

Datalog Educational System or DES is a handy, multiplatform, prolog-based implementation of a basic deductive database system. This tool enjoys Datalog and SQL query languages, full recursive evaluation with memoization techniques, arithmetic, stratified negation and novel approaches to declarative debugging, null values support, (tabled) outer join and aggregate predicates.

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