计算机专业英语实用教程 教学课件 作者 梁晓晖 计算机专业英语（数据库1）.pptVIP

计算机专业英语 公欲成其事，必先利其器。 制作：梁晓晖 联系方式：icygirl66@126.com Unit Three Database Keywords： definition 定义 architecture 体系结构 database 数据库 database management system 数据库管理系统 conceptual 概念上的 relational database model 关系型数据库模型 DBMS 数据库管理系统 Passage One Database Overview Unit Three Database Keywords： security 安全 backup 备份 query 查询 entry 条目 update 升级 fetch 读取 execute 执行 Passage One Database Overview Unit Three Database Keywords： interpret 解释 optimizer 优化程序，优化器 transaction 事务 table 表 index 索引 referential integrity constraint 引用完整性约束 Passage One Database Overview Unit Three Database Keywords： Data Definition Language 数据定义语言 Data Control Language 数据控制语言 Data Manipulation Language 数据操作语言 retrieve 检索 commit 提交 rollback 回滚 recovery 恢复 data warehouse 数据仓库 Passage One Database Overview Unit Three Database Keywords： analytical 分析的 distributed 分布式的 hypermedia 超媒体 analogous 相似的 object-oriented data model 面向对象数据库模型 Passage One Database Overview Word-building ： 连字符构词法 两个词语通过连字符“-”连接在一起， 构成一个包含该两个词语含义的 合成词。 例如：object-enhanced post-relational pre-relational等等 Unit Three Database Passage One Database Overview Sentences ： Clearly separating the three levels was a major feature of the relational database model that dominates 21st century databases. Unit Three Database Passage One Database Overview Sentences ： It provides a common view of the database that is uncomplicated by details of how the data is stored or managed, and that can unify the various external views into a coherent whole. Unit Three Database Passage One Database Overview Sentences ： A database management system (DBMS) consists of software that operates databases, providing storage, access, security, backup and other facilities. Unit Three Database Passage One Database Overview Sentences ： Database management systems can be categorized according to the database model that they support, such as relat