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
- museum website development and digital communication system
- museum Wechat development and digital communication system
- museum Weibo development and digital communication system
- museum workshop
- Museu Picasso
- Musgrave Ranges
- Mushanokōji Saneatsu
- Mu Shiying
- mushroom house of Hani nationality
- mushroom-like foam
- mushroom management law
- Mushroom Manual
- mushroom poisoning
- mushroom toxins
- mushy region
- Musica
- music acoustics
- music aethetics of Aristotle
- music aethetics of Confucius
- music aethetics of Heraclitus
- music aethetics of Ji Kang
- music aethetics of Li Zhi
- music aethetics of Plato
- music aethetics of Pythagorean
- music aethetics of Rousseau