中英▼
go top

weak entity
美 [wiːk ˈentəti]

  • 弱势个体；弱实体

网络释义专业释义英英释义

  弱实体

弱实体(Weak Entity)：有些实体型态本身可以没有任 何键值属性，其辨认方式是透过另一个实体型态的 一些属性数值所组成的相关特定实体。

基于468个网页-相关网页

  弱个体

...able, 例如: Person, Automobile,„ – Entity Set: It is a collection of entities of the same type – Weak Entity (弱个体) : An entity is considered as a weak entity, if and only if its existence is dependent on the existence of another entit...

基于18个网页-相关网页

  弱势个体

 个体- 关系模式(E-R Model) 中的概念  个体：一般个体(Regular Entity) 与弱势个体(Weak Entity)  个体类型(Entity Type) ：由同一类个体所组成  特性(Properties) ：单一特性或复合特性  关系：一般关系(Regular Relati...

基于12个网页-相关网页

短语

weak entity set 弱实体集

Weak Entity Types 弱实体型态 ; 弱实体类型

Weak Entity Type 弱实体类型 ; 弱实体型态

Weak Entity Sets 弱实体集

 更多收起网络短语
  • 弱实体 - 引用次数：1

    参考来源 - 基于耦合度的虚拟企业自组织研究
  • 弱实体

·2,447,543篇论文数据，部分数据来源于NoteExpress

Weak entity

  • abstract: In a relational database, a weak entity is an entity that cannot be uniquely identified by its attributes alone; therefore, it must use a foreign key in conjunction with its attributes to create a primary key. The foreign key is typically a primary key of an entity it is related to.

以上来源于: WordNet

权威例句

  • That a newish, smallish, nonhomogeneous, resource-poor, relatively weak entity could endure and even prosper in the always-boiling cauldron of Middle East politics, while internally permitting a fair degree of freedom, is living testament to this king's skills.

    FORBES: Fact & Comment

  • If you own stock in a company that is the object of one or more hostile takeover bids it could mean that it is viewed as financially weak and a good "buying" opportunity for a larger entity.

    FORBES: Signs That It Might Be Time To Sell

$firstVoiceSent
- 来自原声例句
小调查
请问您想要如何调整此模块？

感谢您的反馈，我们会尽快进行适当修改！
进来说说原因吧 确定
小调查
请问您想要如何调整此模块？

感谢您的反馈，我们会尽快进行适当修改！
进来说说原因吧 确定