relational model

基本解釋

They are relational databases that provide the strengths of the relational model and its set processing.
這兩種都是關(guān)系型的數(shù)據(jù)庫，因而包含了關(guān)系模型及其集合處理的長處。
A primary key is a special thing in the relational model: It must be unique to each record (row) of a table.
在關(guān)系模型中主鍵是特殊的事物：它對于表的每個記錄（行）必須是唯一的。
Semi-structured data refers to data with some form of structure but not enough structure to fit gracefully into a relational model.
半結(jié)構(gòu)化數(shù)據(jù)是指帶有某些形式的結(jié)構(gòu)但是結(jié)構(gòu)還不足以完美地適合關(guān)系模型的數(shù)據(jù)。

關(guān)系模型
Object-oriented technology is the most popular softwaredevelopment method, and relational model is wide-used data model.
面向?qū)ο蠹夹g(shù)是當(dāng)今最流行的軟件開發(fā)方法，關(guān)系模型是最常用的一種數(shù)據(jù)模型。
關(guān)系模式
The algorithm process the foreign key constraints on the global schmal of the data integration system based on the relational model which use the global as view mapping.
該算法基于關(guān)系模式,采用全局視圖映射方法,對帶完整性約束的數(shù)據(jù)集成系統(tǒng)全局模式上定義的參照完整性約束進(jìn)行處理。
關(guān)聯(lián)式模型
關(guān)聯(lián)模型
關(guān)連式模型

關(guān)聯(lián)模型
The method for obtaining the information of connections between parts is presented using the interface of the platform. A relational model of assembly is employed to characterize the information of parts connections based on graph theory.
提出通過CAD 平臺的接口獲取子裝配體內(nèi)零件信息及約束關(guān)系的方法,建立了產(chǎn)品的子裝配關(guān)聯(lián)模型,并用圖論中的關(guān)聯(lián)圖表征了該模型。
管理學(xué)
關(guān)系模型