- relational query by example
- см. RQBE
Англо-русский словарь по компьютерной безопасности. Академик.ру. 2011.
relational query by example
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Query by Example — (QBE) is a database query language for relational databases. It was devised by Moshè M. Zloof at IBM Research during the mid 1970s, in parallel to the development of SQL. It is the first graphical query language, using visual tables where the… … Wikipedia
Query by Example — (Suche anhand von Beispielen) bezeichnet eine relationale Datenbankabfragesprache, die von Moshé M. Zloof bei IBM parallel zu System R entwickelt wurde. Sie beruht im Wesentlichen auf dem Bereichskalkül. Dabei wird die Abfrage nicht wie in SQL… … Deutsch Wikipedia
query language — ▪ computer science a computer programming language used to retrieve information from a database. The uses of databases are manifold. They provide a means of retrieving records or parts of records and performing various calculations… … Universalium
Query optimization — is a function of many relational database management systems in which multiple query plans for satisfying a query are examined and a good query plan is identified. This may or not be the absolute best strategy because there are many ways of doing … Wikipedia
Relational Model/Tasmania — (RM/T) was published by E.F. Codd in 1979 and is the name given to a number of extensions to his original relational model (RM) published in 1970. The overall goal of the RM/T was to define some fundamental semantic units, at atomic and molecular … Wikipedia
Relational algebra — Not to be confused with Relation algebra. Relational algebra, an offshoot of first order logic (and of algebra of sets), deals with a set of finitary relations (see also relation (database)) that is closed under certain operators. These operators … Wikipedia
Relational model — The relational model for database management is a database model based on first order predicate logic, first formulated and proposed in 1969 by Edgar Codd. [ Derivability, Redundancy, and Consistency of Relations Stored in Large Data Banks , E.F … Wikipedia
Query optimizer — The query optimizer is the component of a database management system that attempts to determine the most efficient way to execute a query. The optimizer considers the possible query plans for a given input query, and attempts to determine which… … Wikipedia
Relational database — A visual diagram showing the relationship between the two tables, as indicated by the arrow A relational database matches data by using common characteristics found within the data set. The resulting groups of data uses the relational model (a… … Wikipedia
Conjunctive query — In database theory, a conjunctive query is a restricted form of first order queries. A large part of queries issued on relational databases can be written as conjunctive queries, and large parts of other first order queries can be written as… … Wikipedia
Structured Query Language — SQL Apparu en 1974 Auteur Donald D. Chamberlin et Raymond F. Boyce Développeur IBM Dernière version stabl … Wikipédia en Français
