Research on geographical relational database model in webgis 中的地理關(guān)系數(shù)據(jù)庫模型研究
Rough relational database model and its relational operations 關(guān)系數(shù)據(jù)庫模型及其關(guān)系操作
Research and implement on relational databases model with special attributes 草莓保鮮方法研究初報(bào)
Are consistent with those in the relational database model Dataset中的方法和對(duì)象與關(guān)系數(shù)據(jù)庫模型中的方法和對(duì)象一致。
But mapping class hierarchies to a relational database model might prove somewhat difficult 但是,把類的層次結(jié)構(gòu)映射到關(guān)系數(shù)據(jù)庫模型,可能會(huì)比較困難。
In the 1970s , the rigorous mathematical work of e . f . codd and others created the now - ubiquitous relational database model 70年代, e . f . codd與其他一些人通過嚴(yán)格的數(shù)學(xué)工作創(chuàng)造了現(xiàn)在無處不在的關(guān)系數(shù)據(jù)庫模型。
This article covers three strategies that you can use in your everyday programming to easily map complex object models to relational database models 本文將介紹三個(gè)策略,在日常的編程之中您可以用它們把復(fù)雜的對(duì)象模型容易地映射到關(guān)系數(shù)據(jù)庫模型。
Abstract : temporal relational database model is extended from relational database by adding time processing , and temporal object - orient database model is extended from object - orient database by adding time processing 文摘:時(shí)態(tài)關(guān)系數(shù)據(jù)庫在關(guān)系數(shù)據(jù)庫的基礎(chǔ)上擴(kuò)充了對(duì)時(shí)間數(shù)據(jù)的處理,而時(shí)態(tài)面向?qū)ο髷?shù)據(jù)庫則是在面向?qū)ο髷?shù)據(jù)庫的基礎(chǔ)上擴(kuò)充了對(duì)時(shí)間數(shù)據(jù)的處理。
While xml enthusiasts have begun to see everything in the world encoded with xml tags , the relational database model is entrenched and most of the world s digital data is encoded in tables that are composed of rows and fields 雖然xml的狂熱者可能將世界上的一切都看成是用xml標(biāo)簽編碼的,單關(guān)系數(shù)據(jù)庫模型仍然根深蒂固,世界上大部分?jǐn)?shù)字?jǐn)?shù)據(jù)是用由行和列組成的表來進(jìn)行編碼的。
This paper makes use of how to build the object model for the system utilizing object - oriented tecnique in the system implement and the process of the mapping from object model to the relational database model in order to build database 依據(jù)所提出的產(chǎn)開發(fā)過程模型,說明了基于動(dòng)程的產(chǎn)品開發(fā)建模方法? dmpa 。利用面相對(duì)象技術(shù)建立系統(tǒng)對(duì)象模型的方法,以及對(duì)象模型向關(guān)系數(shù)據(jù)庫的映射,建立數(shù)據(jù)庫。