partial key
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 ... , 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 ... ,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 ... ,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 ... ,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 ... ,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 ...
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 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 |