理学 数据库系统 释 data model 数据模型 数据库领域中定义数据及其操作的抽象表示方式。数据模型是数据库系统的核心和基础。各种数据库管理系统（DBMS）软件都是基于某种数据模型的。
data model 数据模型
数据库 数据库理论 释文 data model 数据模型
- The French National Institute of Sport
- The French new wave cinema
- The Frenzy of Orlando
- The Frick Collection
- the frigid Qinghai-Xizang Plateau of China
- The frog meridian of yellow Emperor
- The Frogs
- The Front
- The Frontier
- The Frontier Health and Quarantine Law of the People's Republic of China
- The Front the Poet Group
- the fugitives
- the Fujian Poets’Club
- the function of Pu-239 and Pu-240 as an environmental indicator
- the function of the criminal law
- the function of the mass media
- The Functions of Social Conflict
- the fundamental principles of international economic law
- the fu oeuvre of King of Huainan
- the fu oeuvre of King of Huainan’s officials
- The Fu Oeuvre of Kong Zang
- The Future of Data Analysis
- The Future of New China
- The Future of Wuxi City
- The Future Results of British Rule in India