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
- educational documentary
- Educational Drama Program in Warwick University
- educational equality
- educational equipment system
- educational equity
- Educational Essays of Tao Xingzhi
- educational ethic
- educational ethics
- educational ethnography
- educational evaluation method
- educational expectation
- educational experience
- educational facilities planning
- educational fairness
- educational film
- educational form
- educational function
- educational function of literature
- educational game
- educational idea
- educational ideal
- educational image
- educational inequality
- educational informationization
- educational informatization