【正文】 ge number of twodimensional data tables. Reuse indexing technology linking the table in order to find all the necessary data, this, in turn, is bound to affect the use of the response speed. Database various databases is currently the most important and the most popular database. Relational database system to support the relational model of database systems, relationships between data model structure, relations operation and integrity constraint set is posed of three parts. Office Access2020 is the Chinese version of one of the ponents. Access2020 to the previous version, the Access2020 is not only a more friendly interface, but their functions have also been strengthened, especially work function was improved, Inter Access2020 so that it more closely connected. Access2020 is a small and mediumsized database management system, easy to use, powerful, and other databases have a good interface. Access2020 through powerful tool, users can facilitate the use and management of databases, such as the creation and editing of data tables, design and the use of various tools inquiries query operation, design and the use of windows, production and printing statements, the design and use of Acer, the design and use of such Web pages. May also be used in Visual (Visual for Application)Advanced Application Development procedures. Access2020 is a plete database application development tool, the user can design, modify, View a record of the basic data table。它是一個(gè)功能非常強(qiáng)大的數(shù)據(jù)庫管理系統(tǒng)的 MIS 系統(tǒng)開發(fā)工具。 Access2020 是一種關(guān)系型的數(shù)據(jù)庫工具，關(guān)系數(shù)據(jù)庫是已經(jīng)開發(fā)的最常用的數(shù)據(jù)庫之一。并且在數(shù)據(jù)需要作報(bào)表輸出的時(shí)候，又要反過來將已經(jīng)分散設(shè)置的大量的兩維數(shù)據(jù)表，再利用索引的技術(shù)進(jìn)行表的連接后，才能找到我們所需要的數(shù)據(jù)，而這又將會影響到應(yīng)用系統(tǒng)的響應(yīng)速度。 與其它的關(guān)系型數(shù)據(jù)庫管理系統(tǒng)相比， Access2020 具有以下優(yōu)點(diǎn)： 存儲文件單一。 Access2020 中的宏可以實(shí)現(xiàn)操作的自動化，使操作更加簡單、快捷。偽靜態(tài)的應(yīng)用例如報(bào)表的生成，而設(shè)計(jì)的關(guān)系型數(shù)據(jù)庫管理系統(tǒng)，并沒有經(jīng)過針對高效事務(wù)處理而進(jìn)行的優(yōu)化過程。 Access2020 的優(yōu)點(diǎn)在于它能使用數(shù)據(jù)表示圖或自定義窗體來收集信息。 Access2020 數(shù)據(jù)庫管理系統(tǒng)是 Microsoft 公司的 Office 辦公自動化軟件的一個(gè)組成部分。 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 di