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database英文寫作

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ing-bottom: 133.33%;">database英文寫作
  database英文寫作篇1

I imagine a lot about lives in the future.I think two words can summarize my first word is the future, we will have more quickly transportation matter how far we go, it takes only a short the development of science and technology, we can travel to the moon, Mars or somewhere outer le may can live in other second word is use of the fast development of our society, many work can be done by computers or even of things are fully ns just need to give some simple instructions to complete complecated tasks.

  database英文寫作篇2

A database consists of an organized collection of data for one or more uses,typically in digital way of classifying databases involves the type of their contents,for example:bibliographic,document-text,tal databases are managed using database management systems,which store database contents,allowing data creation and maintenance,and search and other access.

Database architecture consists of three levels,external,conceptual and rly separating the three levels was a major feature of the relational database model that dominates 21st century databases.

The external level defines how users understand the organization of the data.A single database can have any number of views at the external internal level defines how the data is physically stored and processed by the computing rnal architecture is concerned with cost,performance,scalability and other operational conceptual is a level of indirection between internal and provides a common view of the database that is uncomplicated by details of how the data is stored or managed,and that can unify the various external views into a coherent whole.

  Database介紹

Database是按照數據結構來組織、存儲和管理數據的倉庫,它產生於距今六十多年前,隨着信息技術和市場的發展,特別是二十世紀九十年代以後,數據管理不再僅僅是存儲和管理數據,而轉變成用戶所需要的各種數據管理的方式。數據庫有很多種類型,從最簡單的存儲有各種數據的表格到能夠進行海量數據存儲的大型數據庫系統都在各個方面得到了廣泛的應用。

在信息化社會,充分有效地管理和利用各類信息資源,是進行科學研究和決策管理的前提條件。數據庫技術是管理信息系統、辦公自動化系統、決策支持系統等各類信息系統的核心部分,是進行科學研究和決策管理的重要技術手段。[1]

數據庫,顧名思義,是存入數據的倉庫。只不過這個倉庫是在計算機存儲設備上的,而且數據是按一定格式存放的。

當人們收集了大量的數據後,應該把它們保存起來進行進一步的處理,進一步的抽取有用的信息。當年人們把數據存放在文件櫃中,可現在隨着社會的發展,數據量急劇增長,現在人們就藉助計算機和數據庫技術科學的保存大量的數據,以便能更好的利用這些數據資源。

要是下定義的話,就應該是:指長期儲存在計算機內的、有組織的、可共享的數據集合。

數據庫包含關係數據庫、面向對象數據庫及新興的XML數據庫等多種,目前應用最廣泛的是關係數據庫,若在關係數據庫基礎上提供部分面向對象數據庫功能的對象關係數據庫。在數據庫技術的早期還曾經流行過層次數據庫與網狀數據庫,但這兩類數據庫目前已經極少使用。

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