【正文】
件,是一個(gè)功能非常強(qiáng)大,且簡單易用的數(shù)據(jù)庫管理系統(tǒng)( DBMS),就是對(duì)數(shù)據(jù)庫進(jìn)行存儲(chǔ)、管理和處理的系統(tǒng)。計(jì)算機(jī)的數(shù)據(jù)庫可以分為兩大類:非關(guān)系型的數(shù)據(jù)庫( flatfile)和關(guān)系型的數(shù)據(jù)庫( relational)。 Access2020 就是關(guān)系型的數(shù)據(jù)庫開發(fā)工具,數(shù)據(jù)庫能夠匯集各種信息以供查詢、存儲(chǔ)和檢索。顯式權(quán)限是指直接賦予某一用戶賬號(hào)的權(quán)限,這是該用戶賬號(hào)專用的,與其他用戶無關(guān)。并且,在現(xiàn)實(shí)數(shù)據(jù)中,有許多類型是關(guān)系型的數(shù)據(jù)庫不能較好地處理的。 Access2020 是 Office2020 中文版的組件之一。在 Access2020 中,可以設(shè)定、修改基本表之間的關(guān)聯(lián),從而實(shí)現(xiàn)在多個(gè)相關(guān)表之間的關(guān)系查詢。具有強(qiáng)大的網(wǎng)絡(luò)功能,可以通過網(wǎng)絡(luò)來傳送數(shù)據(jù)。 Access2020 的一個(gè)數(shù)據(jù)庫文件中包含了該數(shù)據(jù)庫中的全部數(shù)據(jù)表、查詢、窗體、報(bào)表等所有數(shù)據(jù),易于管理。Access2020 內(nèi)有強(qiáng)大的操作向?qū)?,為用戶提供了豐富的數(shù)據(jù)庫基本表模板。 關(guān)系型的數(shù)據(jù)庫在目前是各類數(shù)據(jù)庫中最重要、最流行的數(shù)據(jù)庫。其不可避免的結(jié)果是,在復(fù)雜方式下,相互作用表 的數(shù)量激增,而且還不能很好地提供模擬現(xiàn)實(shí)數(shù)據(jù)關(guān)系的模型。綜上所述, Access2020 作為關(guān)系型的數(shù)據(jù)庫開發(fā)具備了很多優(yōu)點(diǎn),可以在一個(gè)數(shù)據(jù)包中同時(shí)擁有桌面數(shù)據(jù)庫的便利和關(guān)系型的數(shù)據(jù)庫的強(qiáng)大功能。 另外,隨著熱門網(wǎng)站訪問數(shù)量的逐漸增加,對(duì)數(shù)據(jù)庫本身的存儲(chǔ)機(jī)制、大量并發(fā)用戶的使用需求、 存儲(chǔ)空間的使用效率、以及數(shù)據(jù)的完整性和安全性等方面都提出了更高的要求。數(shù)據(jù)庫是存儲(chǔ)在一起的相關(guān)數(shù)據(jù)的集合,這些數(shù)據(jù)是結(jié)構(gòu)化的,數(shù)據(jù)庫是一種用來存儲(chǔ)數(shù)據(jù)并且對(duì)數(shù)據(jù)進(jìn)行管理的工具。 design and use of Acer, a series of tables for specific operations. Access2020 with a strong operational guide, and to provide users with a rich database table basic template. Users only need a simple database operations can be established by using the basic form, Form and statements. In Access2020, can be set, to alter the basic correlation between the tables, thus achieving a number of related tables in the relationship between the inquiries. Access2020The operation can achieve automation, the operator is more simple and efficient. Access2020 to enhance the work function, users can plete the ease of web publication. Access2020 can not only deal with their own database files. Could also address some other database management software system established by the database files, the ability to distinguish Base. FoxBASE, FoxPro, Paradox, database formats, such as documents, and support the open database connectivity standard (ODBC) SQL. Access2020 with workstations, servers or databases on the mainframe database interconnected and can be used for building client/server applications of the workstation. And other relational database management systems, Access2020 have the following advantages: Storage single document. Access2020 of a database file contains the database of all data tables, query, windows, all statements, and other data manageable. Support for long file names and file name can be added to the blank, documents easily prehensible search. Powerful work function can be transmitted through the work data. Easy to use, you do not need to understand the programming language can easily design and development of database applications. Can handle a variety of data and information, such as text files and other databases of documents. 譯文: Access2020 關(guān)系型數(shù)據(jù)庫 在 Office 的家族成員當(dāng)中,人們最初對(duì)于 Access2020 的了解,往往只是局限在它的操作界面中,對(duì)于數(shù)據(jù)庫的管理功能仍然只是停留在建立數(shù)據(jù)表、數(shù)據(jù)的輸入、使用窗體向?qū)А⑹褂脠?bào)表向?qū)?、?shù)據(jù)訪問的