partial key
A weak entity type is one whose primary key includes some attribute(s) that reference another entity. In other words a foreign key is a subset of ...,部分鍵. partial key. 以partial key 進行詞彙精確檢索結果 ... 出處/學術領域, 中文詞彙, 英文詞彙. 學術名詞 電子計算機名詞, 部分鍵, partial key ...
| 相關軟體 MySQL Workbench 資訊 | |
|---|---|
 partial key 相關參考資料
CH02 實體關係模式--基本概念- PostgreSQL 中文-Mammoth
構成關鍵屬性的單純屬性被稱為部分鍵(Partial key)，ERD用底線虛線表示。 識別關係型態(Identifying relationship type) => 所依賴的關係型態。ERD用雙菱形框表示 ... http://postgresql.wisdomfish.o Foreign Keys vs. Partial Keys and their E-R representations ...
A weak entity type is one whose primary key includes some attribute(s) that reference another entity. In other words a foreign key is a subset of ... https://stackoverflow.com partial key - 部分鍵 - 國家教育研究院雙語詞彙
部分鍵. partial key. 以partial key 進行詞彙精確檢索結果 ... 出處/學術領域, 中文詞彙, 英文詞彙. 學術名詞 電子計算機名詞, 部分鍵, partial key ... http://terms.naer.edu.tw Partial-Key Attributes - University of Winnipeg
An attribute is a Partial Key if a Key from a related entity type must be used in conjunction with the attribute in question to uniquely identify instances of a ... https://ion.uwinnipeg.ca What is a partial key in database systems? - Quora
In Entity-Relationship modeling a partial key is an attribute of a weak entity type that combined with the identifying relationships will identify entities of the entity ... https://www.quora.com What is the difference between a Foreign key and a partial key in ...
Partial keys and foreign keys are not directly comparable. There are two main kinds of keys, primary keys and foreign keys. The primary key of a table is ... https://www.quora.com 國企系資料庫系統概論第二週(310)內容
特別要強調的是, Key Attribute是由某個Entity Set的資料來決定, 因此Name這個 ... Partial或Total Participation: 所謂Total是指Entity Set內的每一個Entity都一定存在 ... https://ssyu.im.ncnu.edu.tw |