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entity-relationship model中文是什么意思

  • er模型
  • (實體關系模型):公司的實體、屬性和關系的詳細邏輯表示。
  • 實體聯(lián)系模型

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  • 例句與用法
  • 12 chen p p . the entity - relationship model - toward a unified view of data
    例如,定義一個問題歸約范疇有所有的問題類組成。
  • The entity - relationship model has gained acceptance in database design and is widely used in practice
    實質(zhì)-聯(lián)系的模型已經(jīng)得到數(shù)據(jù)庫的接收設計并且廣泛地被用于練習。
  • The entity - relationship model and the object - oriented model are representatives of the class of the object - based logical models
    實質(zhì)-聯(lián)系的模型和物件定向的模型是以物件為基礎的合乎邏輯的模型類別的代表。
  • The object - oriented model includes many of the concepts of the entity - relationship model , but represents executable code as well as data
    物件定向的模型含實質(zhì)-聯(lián)系的模型許多觀念,但是表現(xiàn)可運行的碼和數(shù)據(jù)。
  • Some authors draw a clear line between the design models , typically uml models or entity - relationship models which are supposed to be abstract , and the xml schemas which include lots of implementation details
    一些作者在設計模型和xml模式之間劃了一條清晰的界線,設計模型通常是uml模型或實體-關系模型,被認為是抽象的,而xml模式則被認為包含大量的實現(xiàn)細節(jié)。
  • Database of data warehouse and traditional operational database are compared in this paper , then the design of " normative " operation system is reviewed , four typical data models are introduced - entity - relationship model 、 object model 、 dimensional model and star model
    摘要比較了數(shù)據(jù)倉庫數(shù)據(jù)庫與傳統(tǒng)操作型數(shù)據(jù)庫,回顧了“規(guī)范的”操作型系統(tǒng)設計,介紹了四種典型的數(shù)據(jù)模型實體關系模型、對象模型、維模型和星型模型。
  • In addition , it puts forward a nested temporal db , which , with stronger expressive ability than others , is a breakthrough to entity - relationship model and is referred to as nter model . it also verifies the expressive ability of nter when it is applied to sidss . finally , in view of the features of sidss and the current status of salary distribution system , it conducts initial study of the sidss based on temporal - spatial relationship and the sidss with a temporally - driven knowledge database , with the aim for us to develop a consummate sidss system in the future
    本文中,介紹了時態(tài)數(shù)據(jù)庫的基本概念、發(fā)展、特點和分類;結合sidss的背景、特色及體系結構,詳細討論了sidss的時態(tài)性及其數(shù)學模型,指出將時態(tài)數(shù)據(jù)庫應用到sidss并作進一步的研究是必然趨勢,并在此基礎上研究了時態(tài)數(shù)據(jù)庫系統(tǒng)的模型;在探討了幾種模型之后,打破實體-關系類的模型的框框,提出了一個表達能力較強的嵌套時態(tài)數(shù)據(jù)模型,稱之為nter模型( nestedtemporalentity - relationshipmodel ) ,并驗證將其應用到sidss系統(tǒng)中的表達能力;最后針對sidss的特點以及目前工資管理系統(tǒng)的狀況,進一步對基于時空關系的sidss系統(tǒng)、由時態(tài)驅動知識庫的sidss系統(tǒng)進行初步探討,以期今后對開發(fā)更完善的引) ss系統(tǒng)作進一步的研究。
  • Topics include : relational databases , sql ( structured query language ) ; types , relations , relational algebra , integrity , view ; functional dependency theory , normalization , semantic modeling , entity - relationship modeling , conceptual database design ; concurrency control , security ; database and web connectivity , xml
    主題包括:關聯(lián)式資料庫、 sql (結構查詢語言) ;資料類型、關聯(lián)、關聯(lián)式代數(shù)、完整性、景觀表;功能依附理論、正規(guī)化、語義塑模、實體關聯(lián)塑模、概念性資料庫設計;同時操作控制、安全;資料庫與網(wǎng)頁連結、 xml (可擴展標示語言) 。
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