Contains references to the attributes used to identify an instance of the entity to the user 包含对用来为用户标识实体实例的属性的引用。
The mapping rule from express data schema to relational databases schema is studied . the translation of the different semantic data types of express into the data definition language of sql is discussed . the persistency of step data in relational databases is realized based on an entity instance manager in working form 论文对express信息模型到关系数据库模型的映射规则进行了研究,详细分析了express语言的不同数据类型到sql数据类型的转化方法,并对内存实现方式的产品数据仓库的结构、功能进行了研究,阐述了基于关系数据库的实体实例索引表的建立方法。
实体: substance entity实例: living example; example; tur ...体实体: body entity具体实例: instantiation具体实例分析: case-study领域中的具体实体: concrete entity实例: living example; example; turnabout; case; undershoot 这样的实例举不胜举。 it would be an endless task to cite such living examples.; 实例教学法 case study method实体: 1.[哲学] substance2.[法律] entity 一个独立的政治实体 an independent political entity; 经济实体 economical entity; 德国东西方统一后就是一个统一的政治实体了。 since the east and west germanies were unified they are a polictical entity 半导体实验: semiconductor experiments具体实践: concrete practice具体实现: concreteprototype客体实际: objective actuality离体实验: in vitro experiment媒体实践: media practice媒体实验室: media laboratory扭体实验: abdominal constriction test群体实验: population experiment染色体实变: chromosomal mutation人体实验: human experiment圣体实在: real presence团体实验: group experiment叶元体实度: solidity of blade elements在体实验: in vivo experimen整体实验: integral experiment比实例: r rate