【正文】 account management, user access, work security control, data constraints) (11) to support a variety of word processing capability Including the database description of a variety of text processing language (table name, domain name, data) support ability and the database development tool for a variety of text. (12) the ability of data recovery When a sudden power failure, hardware failure, software failure, virus or serious errors in operation, the system should provide the restore database functions, such as regular turn, restore the backup, rollback, make the system have the ability to recover the database to the state before the damage. 摘自 《 An Introduction to Database Systems, Eighth Edition》 Addison Wesley/Pearson （美） . Date ISBN10: 0321197844 ISBN13: 9780321197849 2020 年 【開 本】 16 開 【頁 碼】 1024 【版 次】 8 數(shù)據(jù)庫信息管理系統(tǒng)簡介 數(shù)據(jù)庫是存儲在一起的相關數(shù)據(jù)的集合，這些數(shù)據(jù)是結構化的，無有害的或不必要的冗余，并為多種應用服務；數(shù)據(jù)的存儲獨立于使用它的程序；對數(shù)據(jù)庫插入新數(shù)據(jù)，修改和檢索原有數(shù)據(jù)均能按一 種公用的和可控制的方式進行。當某個系統(tǒng)中存在結構上完全分開的若干個數(shù)據(jù)庫時，則該系統(tǒng)包含一個“數(shù)據(jù)庫集合”。系統(tǒng)利用一個資源共享的數(shù)據(jù)庫來達到綜合的目的。 根據(jù)處理對象的不同，數(shù)據(jù)庫管理系統(tǒng)的層次結構由高級到低級依次為應用層、語言翻譯處理層、數(shù)據(jù)存取層、數(shù)據(jù)存儲層、操作系統(tǒng)。 根據(jù)從而總結出數(shù)據(jù)庫的 技術特點，共有 5 個特點： （ 1）采用復雜的數(shù)據(jù)模型表示數(shù)據(jù)結構，數(shù)據(jù)冗余小，易擴充，實現(xiàn)了數(shù)據(jù)共享。 包括數(shù)據(jù)透明與網(wǎng)絡透明程度。 。數(shù)據(jù)庫管理系統(tǒng)自動將數(shù)據(jù)包轉換成相應的協(xié)議數(shù)據(jù)。 （ 3）數(shù)據(jù)庫系統(tǒng)為用戶提供了方便的用戶接口。 語言翻譯處理層 語言翻譯處理層是對數(shù)據(jù)庫語言的各類語句進行語言分析、視圖轉換、授權檢查、完整性檢查等。到目前為止，在進行人工計算機化時，仍然缺乏設計經(jīng)驗和 (或 )缺少信息服務人員與用戶之間的交流。它對數(shù)據(jù)庫進行統(tǒng)一的管理和控制，以保證數(shù)據(jù)庫的安全性和完整性。 the database capacity, capacity characteristic database determines the scope of use of the database management system. (2) the degree of difficulty of program development. There is no puter aided software engineering tool CASE puter aided software engineering tools can help developers to provide maintenance, coding environment in the development phase of the method according to software engineering, development, maintenance is convenient for plex software. A design method of the fourth generation language development with a non procedural language platform without the fourth generation language, the user does not need to write code to process plex, and easy to understand, easy maintenance. A logical way of non object oriented design platform the idea of objectoriented design is very similar to humans, to facilitate the development and maintenance. The multimedia data type support multimedia data needs is a development trend in the future, will be a database management system to support multimedia data types to reduce application development and maintenance. (3) performance analysis of database management system. Including evaluating performance (response time, throughput of data per unit time), performance monitoring (internal and external memory usage, system input / output rate, the SQL statement, the database tuples control), performance management (parameter setting and adjustment). (4) for distributed application support. Including data transparency and work transparency. Transparent data refers to the user does not need to point out what the data on the nodes in the work in the application, the database management system can automatically search the Inter, extract the required data。通常的信息系統(tǒng)是上述各種類型的組合。通過定義可知，綜合要求業(yè)務領域經(jīng)理和公司領導密切地合作。 （ 4） 數(shù)據(jù)的組織與存?。禾峁?shù)據(jù)在外圍儲存設備上的物理組織與存取方法。 (3)數(shù)據(jù)庫管理系統(tǒng)的性能分析。 異常情況下對數(shù)據(jù)的容錯處理。 (6) 可移植性和可擴展性。 （ 5）增加了系統(tǒng)的靈活性。 操作系統(tǒng) 操作系統(tǒng)是 DBMS 的基礎。在設計這些系統(tǒng)時，很少考慮到最終要將它們綜合的意圖。它使用戶能方便地 定義和操縱數(shù)據(jù)，維護數(shù)據(jù)的安全性和完整性，以及進行多用戶下的并發(fā)控制和恢復數(shù)據(jù)庫。 to achieve full sharing of data resources, and so on. In addition, the database technology also provides users with a very simple means to enable users to easily use the preparation of the database appli