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Relational language is a type of programming language in which the programming logic is composed of relations and the output is computed based on the query applied. Relational language works on relations among data and entities to compute a result. Relational language includes features from and is similar to functional programming language.
Relational language is primarily based on the relational data model, which governs relational database software and systems. In the relational model’s programming context, the procedures are replaced by the relations among values. These relations are applied over the processed arguments or values to construct an output. The resulting output is mainly in the form of an argument or property. The side effects emerging from this programming logic are also handled by the procedures or relations.