Titlebook: Advances in Data Base Theory; Volume 2 Hervé Gallaire,Jack Minker,Jean Marie Nicolas Book 1984 Plenum Press, New York 1984 Base.Volume.addi

interlude

BATE

Properties of Views and their Implementation used until mid 20th century. This work is unique in that it provides an archaeological and analytical interpretation of the content of these metallic objects: inscriptive, pictorial or both. As the component chapters show, these coin-like objects represent a wealth of Chinese traditional folk belie

半身雕像

Back Matterconversational proficiency in interlingual & intercultural c.This book explores diverse cultural and linguistic landscapes, unraveling the fusion of language, culture, and corporatism. It breaks new ground by examining lesser-known linguistic-cultural aspects of corporate communication. It provides

Ceramic

https://doi.org/10.1007/978-94-009-3801-4ossless join decomposition of a universal relation scheme which is additionally acyclic. Our method essentially uses the options of the original method of how to group functional dependencies with the identical left hand side. Furthermore we present a decomposition theorem for acyclic database schem

ALIBI

季雨

S. F. Van Amerongen,J. Van Paradijs Call JM-schema a schema which is both a J-schema and an M-schema. Fagin et al. [1980] and Beeri et al. [1981] introduced the notion of an acyclic J-schema and showed that a J-schema is acyclic if and only if it is a JM-schema. Acyclic Schemas have certain desirable properties and this led to the ge

谦卑

Absenteeism

Óscar García Agustín,Malayna Raftopoulosbase design time and are to be applied when updates to the database are issued. A significant feature is that the tests are to be applied before the update is made. The basic method is to assert a constraint for the current state of the database, express the new state in terms of both the old state

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https://doi.org/10.1007/978-3-030-54867-4ting these values whenever parameters on which they depend are modified. Examples were given that illustrated how this view maintenance strategy could be used to monitor integrity constraints. In this paper, we extend that idea to demonstrate how a DBMS can automatically define its own views that wi

磨坊

Óscar García Agustín,Malayna Raftopoulos flexible to express a wide range of database transition constraints, that is, restrictions on what sequences of database states are meaningful. They are useful in the context of a database design methodology where the first level of specification consists of a purely declarative definition of both