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
- auxiliary electrical power
- auxiliary electrode
- auxiliary element
- auxiliary employment for the disabled
- auxiliary equation
- auxiliary equipment and systems
- auxiliary equipment of axial compressor
- auxiliary equipment of pumping station
- auxiliary equipments
- auxiliary facilities of concentrators
- auxiliary facilities of substation
- auxiliary field
- auxiliary function
- auxiliary function instruction
- auxiliary graph
- auxiliary heating
- auxiliary hypoglycemic function of health food
- auxiliary hypotensive function of health food
- auxiliary instrument
- auxiliary latitude
- auxiliary lens
- auxiliary level
- auxiliary line
- auxiliary machine for opening and cleaning
- auxiliary manipulation