Tuple relational calculus
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Algebra: specifying how to obtain results. SQL: specifying real estate principles a value approach pdf how to derive.Tuple… (More)
Ontology-based data access is a powerful form of extending<lb>database technology, where a classical extensional database<lb>(EDB… (More)
- Encyclopedia of Database Systems
In this paper we introduce and formally define Query by Browsing (QBB), a scalable, relationally complete visual query language… (More)
A neutrosophic set is a part of neutrosophy that studies the origin, nature, and scope of neutralities, as well as their… (More)
A paraconsistent database is one in which information may be incomplete and/or inconsistent. A data model that does not attempt… (More)
RDBI is an educational tool that provides students with the capability to test their understanding of the formal relational query… (More)
This note presents a translation of a subset of the relational query language SQL into the well known tuple calculus. Roughly… (More)
- ACM Trans. Database Syst.
In a temporal database, time values are associated with data item to indicate their periods of validity. We propose a model for… (More)
In classical database theory, relational calculus has long been used in expressing query formulae and integrity constraints. In… (More)