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
- comparative bibliography
- comparative claims
- comparative dictionary
- comparative education
- comparative effectiveness research
- comparative embryology
- comparative ethics
- comparative exhibition
- comparative experiment research
- comparative genomic hybridization，CGH
- comparative genomics
- comparative geography
- Comparative Graphology
- comparative half life
- comparative half-life
- comparative historical analysis
- comparative history
- comparative hydrology
- comparative institutional analysis
- comparative journalism
- comparative jurisprudence
- comparative law and economics
- comparative lexicography
- comparative librarianship
- Comparative Library Science