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Datalog is a query language similar to SQL. It doesn't store data. Some database would store data however it likes then provide a datalog query interface.
by stonemetal12 5y ago
Datalog is a query language similar to SQL. It doesn't store data. Some database would store data however it likes then provide a datalog query interface.
- triska 5y agoDatalog also lets you define facts and rules, in addition to posting queries. A key attraction of Datalog is that the same simple and very uniform syntax is used in all cases. All these cases are special cases of a single unifying language element called Horn clauses, which are clauses with at most one positive literal: Queries have no positive literal, rules have exactly one positive literal and at least one negative literal, and facts consist of a single positive literal.