翻訳と辞書 Words near each other ・ regular expression ・ regular expression converter ・ regular graph ・ rehi ・ reid, brian ・ reify ・ reincarnation, cycle of ・ reinvent the wheel ・ rel english ・ relation ・ relational algebra ・ relational calculus ・ relational data model ・ relational database ・ relational database management system ・ relational dbms ・ relational language ・ relational model ・ relative ・ relative pathname Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク relational algebra ： FOLDOC relational algebra A family of algebra with a {well-founded} semantics used for modelling the data stored in relational databases, and defining queries on it. The main operations of the relational algebra are the set operations (such as union, {intersection}, and cartesian product), selection (keeping only some lines of a table) and the projection (keeping only some columns). The relational data model describes how the data is structured. Codd's reduction algorithm can convert from relational calculus to relational algebra. (1997-02-17) スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.