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
- digital circuit
- digital citizenship
- digital city geospatial framework
- Digital City Management
- Digital city management
- digital collaborative management
- Digital collection
- digital collection
- digital collection development policy
- digital colorist
- digital communication
- digital communication network
- digital communication system
- digital compact disc rocordable
- digital component engraving
- digital component making
- digital component processing
- digital compositing
- digital computer
- digital concrete transport control
- digital construction
- digital construction control
- digital construction machinery management
- digital construction schedule management
- digital construction scheme planning