【正文】
向?qū)У纫恍┫鄬?duì)比較簡單的應(yīng)用上面。s rapidly changing business needs, and the development of new technologies. With the rapid IT development, data processing, not only in quantity increasingly demanding, but also the quality of increasingly high demand, database management data has been a fundamental change. This change to the database technology has brought tremendous challenges, Object database management is no longer limited to text data and other simple data types. And the description and the need to preserve a lot of plex unstr uctured multimedia data, and the relationship between the data. Furthermore, in the wake of popular websites surge in the number of visits to its own database storage mechanism, a large number of concurrent users to the demand, storage efficiency in the use of space, and data integrity and security, and other aspects of higher demand. These are not traditional relational database, the use of a simple twodimensional table structure of the meet. Access2020 is the relational database development tools, database pooling information for the inquiry, Storage and retrieval. Access2020 the advantage lies in its ability to use data map or custom windows to collect information. Data provides a map similar to the Excel spreadsheet, database transparent. In addition, the Access2020 allows creation of custom statements to print or export the information in the database. Access2020 also provides a data repository. Can use desktop database file to extend the database file at the work file server and other work users to share databases? Access2020 is a relational database tools, database development, is the most mon databases. As noted above, as an Access2020 database development possesses many advantages, in a data packet available at the same time facilitate the desktop database and a powerful relational database functions. In Access2020, with the user database access permissions are two types: Explicit and implicit powers authority. Explicit authority is granted a direct user account petence, which is the exclusive use of user accounts, has nothing to do with other users. Implicit authority is delegated the authority group account, the user added to the group was given by the group39。 Access2020 數(shù)據(jù)庫管理系統(tǒng)是 Microsoft 公司的 Office 辦公自動(dòng)化軟件的一個(gè)組成部分。關(guān)系型的數(shù)據(jù)庫中包含了多個(gè)數(shù)據(jù)表的信息,數(shù)據(jù)庫含有各個(gè)不同部分的術(shù)語,像記錄等。 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。隱式權(quán)限是指授予組賬號(hào)的權(quán)限,即用戶加入到該組中的同時(shí)被 賦予的組的權(quán)限。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(duì)高效事務(wù)處理而進(jìn)行的優(yōu)化過程。與以前的 Access 版本相比, Access2020 不僅界面更加友好,而且功能也有了加強(qiáng),尤其是網(wǎng)絡(luò)功能有明顯的提高,使 Access2020 與互聯(lián)網(wǎng)的結(jié)合更加密切。 Access2020 中的宏可以實(shí)現(xiàn)操作的自動(dòng)化,使操作更加簡單、快捷。使用簡單,用戶無需要了解編程語言,就可以輕松地設(shè)計(jì)和開發(fā)數(shù)據(jù)庫應(yīng)用程序。 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(chǔ)文件單一。 Access2020 具有完整的數(shù)據(jù)庫應(yīng)用