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
- pottery miniature house found among Han burial
- pottery model of a carriage from a tomb of the Yuan Dynasty at Xi'an
- Pottery Model of a Vessel of Han Dynasty Unearthed from Guangzhou
- pottery mould
- pottery of Taosi culture
- pottery of the Dawenkou culture
- Pottery of West Asia
- pottery pat
- Pottery & Porcelain of China
- pottery pot
- Pottery Records of Jingdezhen
- Pottery Scripts of QIin and Han Dynasty
- pottery sculptures in Tianhuishan
- Pottery Sculptures of Qin and Han Dynasties
- pottery symbols
- Pottery tomb Guardians of the Eastern Wei Dynastythe and Northern Qi Dynasty
- pottery with stamped decorations
- pottery worker＇s pneumoconiosis
- potter’s wheel
- POT test
- potting
- Potts model
- Potwar Plateau
- pot with loop handle
- pouch