database英文寫作
關(guān)于database的英文寫作，大家看過(guò)嗎?下面是學(xué)習(xí)啦小編給大家整理的database英文寫作，供大家參閱!
database英文寫作篇1
I imagine a lot about lives in the future.I think two words can summarize my imagination.The first word is fast.In the future, we will have more quickly transportation means.Now matter how far we go, it takes only a short time.With the development of science and technology, we can travel to the moon, Mars or somewhere outer space.People may can live in other planets.The second word is convenient.Because of the fast development of our society, many work can be done by computers or even robots.Lots of things are fully automated.Humans 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 form.One way of classifying databases involves the type of their contents,for example:bibliographic,document-text,statistical.Digital 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 internal.Clearly 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 level.The internal level defines how the data is physically stored and processed by the computing system.Internal architecture is concerned with cost,performance,scalability and other operational matters.The conceptual is a level of indirection between internal and external.It 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(shù)據(jù)結(jié)構(gòu)來(lái)組織、存儲(chǔ)和管理數(shù)據(jù)的倉(cāng)庫(kù)，它產(chǎn)生于距今六十多年前，隨著信息技術(shù)和市場(chǎng)的發(fā)展，特別是二十世紀(jì)九十年代以后，數(shù)據(jù)管理不再僅僅是存儲(chǔ)和管理數(shù)據(jù)，而轉(zhuǎn)變成用戶所需要的各種數(shù)據(jù)管理的方式。數(shù)據(jù)庫(kù)有很多種類型，從最簡(jiǎn)單的存儲(chǔ)有各種數(shù)據(jù)的表格到能夠進(jìn)行海量數(shù)據(jù)存儲(chǔ)的大型數(shù)據(jù)庫(kù)系統(tǒng)都在各個(gè)方面得到了廣泛的應(yīng)用。
在信息化社會(huì)，充分有效地管理和利用各類信息資源，是進(jìn)行科學(xué)研究和決策管理的前提條件。數(shù)據(jù)庫(kù)技術(shù)是管理信息系統(tǒng)、辦公自動(dòng)化系統(tǒng)、決策支持系統(tǒng)等各類信息系統(tǒng)的核心部分，是進(jìn)行科學(xué)研究和決策管理的重要技術(shù)手段。[1]
數(shù)據(jù)庫(kù)，顧名思義，是存入數(shù)據(jù)的倉(cāng)庫(kù)。只不過(guò)這個(gè)倉(cāng)庫(kù)是在計(jì)算機(jī)存儲(chǔ)設(shè)備上的，而且數(shù)據(jù)是按一定格式存放的。
當(dāng)人們收集了大量的數(shù)據(jù)后，應(yīng)該把它們保存起來(lái)進(jìn)行進(jìn)一步的處理，進(jìn)一步的抽取有用的信息。當(dāng)年人們把數(shù)據(jù)存放在文件柜中，可現(xiàn)在隨著社會(huì)的發(fā)展，數(shù)據(jù)量急劇增長(zhǎng)，現(xiàn)在人們就借助計(jì)算機(jī)和數(shù)據(jù)庫(kù)技術(shù)科學(xué)的保存大量的數(shù)據(jù)，以便能更好的利用這些數(shù)據(jù)資源。
要是下定義的話，就應(yīng)該是：指長(zhǎng)期儲(chǔ)存在計(jì)算機(jī)內(nèi)的、有組織的、可共享的數(shù)據(jù)集合。
數(shù)據(jù)庫(kù)包含關(guān)系數(shù)據(jù)庫(kù)、面向?qū)ο髷?shù)據(jù)庫(kù)及新興的XML數(shù)據(jù)庫(kù)等多種，目前應(yīng)用最廣泛的是關(guān)系數(shù)據(jù)庫(kù)，若在關(guān)系數(shù)據(jù)庫(kù)基礎(chǔ)上提供部分面向?qū)ο髷?shù)據(jù)庫(kù)功能的對(duì)象關(guān)系數(shù)據(jù)庫(kù)。在數(shù)據(jù)庫(kù)技術(shù)的早期還曾經(jīng)流行過(guò)層次數(shù)據(jù)庫(kù)與網(wǎng)狀數(shù)據(jù)庫(kù)，但這兩類數(shù)據(jù)庫(kù)目前已經(jīng)極少使用。
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