relational data model

"relational data model"的翻譯和解釋

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例句與用法

The history of the development of database technology can be divided into three phases : the first generation is the reticulation / hierarchical data model based on database ; the second generation is the relational data model based database ; the third generation database which has the object oriented character breakthroughs the localization of the traditional database model which is unable to build model based on complex data structure . the third generation has led the database system to a new time
數據庫技術的發(fā)展經歷了三個階段：第一代數據庫系統(tǒng)是基于網狀、層狀數據模型的網狀、層狀數據庫管理系統(tǒng)；第二代數據庫是基于平面關系模型的關系數據庫系統(tǒng)；以面向對象模型為代表的第三代數據庫系統(tǒng)突破了傳統(tǒng)數據模型在復雜數據建模和管理方面存在的局限性，使數據庫系統(tǒng)進入了新的時代。
The hsqldb approach was workable , but it quickly became clear that i would have to pay the object - relational impedance mismatch penalty not once , but twice - once when converting the tree - structured database into a relational data model , and again when trying to turn the results of flat relational queries into structured xml or html result sets
Hsqldb方法是一個可行方法，但您很快就發(fā)現，我必須為對象關系的不匹配而兩次（而不是一次）受罰一次是在將樹型結構數據庫轉換為關系數據模型時，一次是在將平面關系查詢結果轉換成結構化的xml或者html結果集時。
It ' s the process of mapping the temporal conceptual model to the relational data model that we transform the four dimension temporal relationship into the two dimension snapshot relationship , and model the component and the time - varying relationship and attribute in the system
在將一個時態(tài)的概念模型映射至關系的數據模型的過程中，我們首先將一個四維的時態(tài)關系轉化為一個二維的快照關系(即如何表達時間) ，再將sidss時態(tài)關系數據庫的組件及隨時間變化的關系和隨時間變化的屬性模型化。
The content of this paper mainly includes investigation content and methods of electronic multi - media military geographic documentations , the data model of multi - media database ( the object - oriented multi - media data model , the extended relational data model , the hyper - text multi - media model ) , the general and detailed design for multi - media database and the connecting technique between foreground application and background database , which includes odbc , mfc odbc , dao , ole db and ado
本文的主要內容包括多媒體電子兵要地志的研究內容和方法；多媒體數據庫數據模型(面向對象的多媒體數據模型、擴充的關系數據模型、超文本的多媒體數據模型和融合型數據模型) ；多媒體數據庫的總體設計和詳細設計；前臺應用程序與后臺數據庫的多種連接技術，包括odbc 、 mfcodbc 、 dao 、 oledb和ado技術。