- relational join
- БД реляционное объединение таблицдобавление к исходной таблице столбцов другой таблицы, связанных с первой через общее поле (внешний ключ, foreign key)
Англо-русский толковый словарь по геоинформатике. В.Ю. Андрианов. 2015.
relational join
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Relational calculus — consist of two calculi, the tuple relational calculus and the domain relational calculus, that are part of the relational model for databases and provide a declarative way to specify database queries. This in contrast to the relational algebra… … Wikipedia
Join (Unix) — join is a command in Unix like operating systems that merges the lines of two sorted text files based on the presence of a common field. It is a sort of implementation of the join operator used in relational databases but operating on text… … 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
Join — may refer to: * Join (law), to include additional counts or additional defendants on an indictment * Join (mathematics), a least upper bound in lattice theory * Join (relational algebra), a type of binary operator * Join (SQL), a SQL and… … Wikipedia
Join — Join, n. 1. (Geom.) The line joining two points; the point common to two intersecting lines. Henrici. [1913 Webster] 2. The place or part where objects have been joined; a joint; a seam. [PJC] 3. (Computers) The combining of multiple tables to… … The Collaborative International Dictionary of English
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 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
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
Join (SQL) — An SQL join clause combines records from two or more tables in a database.[1] It creates a set that can be saved as a table or used as is. A JOIN is a means for combining fields from two tables by using values common to each. ANSI standard SQL… … Wikipedia
Relational Database Management System — Eine relationale Datenbank dient zur elektronischen Datenverwaltung in Computersystemen und beruht auf dem relationalen Datenbankmodell. Dieses wurde 1970 von Edgar F. Codd erstmals vorgeschlagen und ist bis heute, trotz einiger Kritikpunkte, ein … Deutsch Wikipedia
Relational Database Management Systems — Eine relationale Datenbank dient zur elektronischen Datenverwaltung in Computersystemen und beruht auf dem relationalen Datenbankmodell. Dieses wurde 1970 von Edgar F. Codd erstmals vorgeschlagen und ist bis heute, trotz einiger Kritikpunkte, ein … Deutsch Wikipedia
