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Related to Relational calculus: Tuple relational calculus


1. Of or arising from kinship.
2. Indicating or constituting relation.
3. Grammar Of, relating to, or being a word or particle, such as a conjunction or preposition, that expresses a syntactic relation between elements in a phrase or sentence.

re·la′tion·al·ly adv.


1. (Grammar) grammar indicating or expressing syntactic relation, as for example the case endings in Latin
2. having relation or being related
3. (Computer Science) computing based on data stored in a tabular form: a relational database.


(rɪˈleɪ ʃə nl)

1. of or pertaining to relations.
2. indicating or specifying some relation.
3. (of a word) serving to indicate relations between elements in a sentence, as a preposition (contrasted with notional).
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.relational - having a relation or being related
relative, comparative - estimated by comparison; not absolute or complete; "a relative stranger"


[rɪˈleɪʃənl] ADJrelacional


adjrelational; relational database (Comput) → relationale Datenbank
References in periodicals archive ?
Peeva and Kyosev [30] developed a library for fuzzy relational calculus over the fuzzy algebra([0,l], max, min).
However, the suggested time allocation shows the theory based approach emphasizes more on learning the concepts like relational algebra, relational calculus, query processing and optimization, whereas the all-encompassing approach allocates lesser time and emphasis on these theoretical topics.
Relational Algebra (RA) and Relational Calculus (RC) are core components of relational theory.
The topics include using knowledge management as a tool to improve decision making processes, a knowledge-based code clone approach in embedded and real-time systems, using knowledge management and aggregation techniques to improve web effort estimation, an empirical study of requirement engineering practices in the Pakistani software industry, managing knowledge in open source software test processes, a software system for grading diabetic retinopathy by analyzing retinal images, and demonic fuzzy relational calculus.
He includes exercises, a review of relational calculus, and annotated suggestions for further reading (including Date's An Introduction to Database Systems, 2004).
To bridge this gap, this article develops a systematic method to translate tuple relational calculus queries to SQL.
As a by-product, we obtain an elementary proof of the fact that parity test is not definable in the relational calculus with polynomial inequality constraints.
Relational Calculus with equality and inequality constraint databases, Relational calculus with polynomial inequality constraints, and Datalog with rational order constraints can all be evaluated in closed-form in PTIME data complexity [Kanellakis et al.
Completeness would rule out automation, since specification languages are invariably more expressive than the relational calculus, which is known to be undecidable [Schoenfeld 1979].
The query process makes use of the mathematical principles of set theory and relational calculus, giving rise to a relatively efficient database management system.
So we have a probabilistic relational calculus which yields probabilistic relations as answers.

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