翻訳と辞書 Words near each other ・ 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 ・ relative record data set ・ relatively prime 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 data model ： FOLDOC relational data model (Or "relational model") A data model introduced by E. F. Codd in 1970, particularly well suited for business data management. In this model, data are organised in tables. The set of names of the columns is called the "schema" of the table. Here is an example table with the schema (account number, amount) and 3 lines. account number amount -------------- --------- 12343243546456 +30000.00 23149875245824 +2345.33 18479827492874 -123.25 The data can be manipulated using a relational algebra. SQL is a standard language for talking to a database built on the relational model (a "relational database"). ["A relational model for large shared data banks" Communications of ACM 13:6, pp 377-387]. (1998-10-05) 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.