【正文】 cture stored in the data dictionary. Various data manipulation database (such as search, modify, insert and delete) and the maintenance of database management is a database model based on. （ 2） Application: the pilation contains applications to access the database statement, piled under the support of DBMS can run the program. （ 3） Interactive query: to provide interactive query language is easy to use, such as is responsible for executing the query mand, and query results are displayed on the screen. （ 4） Organize and access data: data storage device on the physical organization and access method in the periphery. （ 5） Transaction management: provide transaction management and operation of the transaction log, security monitoring and data integrity checks, concurrency control and transaction system recovery function. （ 6） The maintenance of the database: provide software support for database administrators, including data security, integrity and security, database backup, database reorganization and performance monitoring and maintenance tools. According to the thus summarizes the technical characteristics of the database, there are 5 characteristics: (1) the data model to represent plex data structures, data redundancy small, easy to expand, to achieve data sharing. (2) data and the independence of procedure has higher, independent database physical and logical independence. (3) the database system provides a convenient user interface for the user. (4) the database system to provide 4 aspects of data control function, respectively is the concurrency control, recovery, integrity and security. The use of the various application data in the database by the database system in accordance with the provisions, establish a certain data model to organize and, by the unified management and centralized control system. (5) increased the flexibility of the system. Select the database management system, the following aspects should be considered: (1) the difficult easy degree structure database. Needs analysis database management system has no paradigm, namely whether the real world must analysis required by the data model of the system, the establishment of the corresponding model。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。 數(shù)據(jù)庫是通過數(shù)據(jù)庫管理系統(tǒng) (DBMSDATA BASE MANAGEMENT SYSTEM)軟件來實現(xiàn)數(shù)據(jù)的存儲、管理與使用的 dBASELL 就是一種數(shù)據(jù)庫管理系統(tǒng)軟件。到目前為止，在進行人工計算機化時，仍然缺乏設(shè)計經(jīng)驗和 (或 )缺少信息服務(wù)人員與用戶之間的交流。多數(shù)聯(lián)機信息系統(tǒng)也有成批處理的要求。 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(zhuǎn)換、授權(quán)檢查、完整性檢查等。數(shù)據(jù)庫的各種數(shù)據(jù)操作 (如查找、修改、插入和刪除等 )和數(shù)據(jù)庫的維護管理都是以數(shù)據(jù)庫模式為依據(jù)的。 （ 3）數(shù)據(jù)庫系統(tǒng)為用戶提供了方便的用戶接口。有無第四代語言的開發(fā)平臺 —— 第四代語言 具有非過程語言的設(shè)計方法，用戶不需編寫復(fù)雜的過程性代碼，易學(xué)、易懂、易維護。數(shù)據(jù)庫管理系統(tǒng)自動將數(shù)據(jù)包轉(zhuǎn)換成相應(yīng)的協(xié)議數(shù)據(jù)。 對于分布式數(shù)據(jù)庫管理系統(tǒng)，并發(fā)控制功能是必不可少的。 。 數(shù)據(jù)完整性指數(shù)據(jù)的正確性和一致性保護，包括實體完整性、參照完整性、復(fù)雜的事務(wù)規(guī)則。 包括數(shù)據(jù)透明與網(wǎng)絡(luò)透明程度。 (2) 程序開發(fā)的難易程度。 根據(jù)從而總結(jié)出數(shù)據(jù)庫的 技術(shù)特點，共有 5 個特點： （ 1）采用復(fù)雜的數(shù)據(jù)模型表示數(shù)據(jù)結(jié)構(gòu)，數(shù)據(jù)冗余小，易擴充，實現(xiàn)了數(shù)據(jù)共享。用它書寫的數(shù)據(jù)庫模式被翻譯為內(nèi)部表示。 根據(jù)處理對象的不同，數(shù)據(jù)庫管理系統(tǒng)的層次結(jié)構(gòu)由高級到低級依次為應(yīng)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)。例如，銀行將大量的支票編碼，然后在一天結(jié)束時，將所在支票分批、排序并進行處理。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。特別是近年來推出的微型計算機關(guān)系數(shù)據(jù)庫管理系統(tǒng) dBASELL，操作直觀，使用靈活，編程方便，環(huán)境適應(yīng)廣泛 (一般的十六位機，如 IBM/PC/XT，國產(chǎn)長城 0520 等均可運行種軟件 )，數(shù)據(jù)處理能力極強。當(dāng)某個系統(tǒng)中存在結(jié)構(gòu)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”。 中文 3647 字 畢 業(yè) 設(shè) 計 （ 論 文 ） 英 文 翻 譯 課題名稱 系 部 電氣與信息工程學(xué)院電信系 專 業(yè) 電子信息工程 班 級 學(xué) 號 姓 名 指導(dǎo)教師 時 間 2 0 1 4 年 3 月 29 日 Introduction to database information management system The database is stored together a collection of the relevant data, the data is structured, nonharmful or unnecessary redundancy, and for a variety of app