logical data type 中文意思是什麼
logical data type
解釋
邏輯數據類型-
Control can display any type of hierarchical data, even if the data hierarchy is logical, as in a database, and not physical, as in an xml file
控制項可以顯示任何類型的分層數據,即使數據的層次結構是邏輯性的(如在數據庫中) ,而不是物理的(如在xml文件中) 。 -
Data type and how to declare variables to hold logical values
數據類型以及如何聲明變量以保存邏輯值。 -
In this paper, with the metallogenic series theory as the guide and the geochemical data as the basis, all lead - zinc ore deposits in the region were classified into two sub - series, i. e., lf type ( with low content of iron group elements ) and hf type ( with high content of iron group elements ), and a regional geochemical prognostic model was set up by using the logical information method
摘要以成礦系列理論為指導,將區域內的鉛鋅礦按地球化學特徵劃分為貧鐵型和富鐵型2個亞系列,進而用邏輯信息法建立了西秦嶺鉛鋅礦床區域地球化學場預測模式,驗證結果較為理想。 -
A compound data type that is typically used to contain a few variables that have some logical relationship
一種復合數據類型,通常用於包含具有某種邏輯關系的多個變量。 -
The conceptual model of database is illustrated with e - r graph. after that, logical design and physical design of database are partly accomplished, and some designing principles of them are analyzed, such as external schema, cluster and index design and data type choosing
在此基礎上使用e - r數據模型描述了這些信息內容,實現了數據庫的概念設計,並部分實現了數據庫的邏輯設計和物理設計,分析了資源配置系統數據庫邏輯和物理設計的原則,如外模式、簇集、索引設計以及數據類型的選擇等。
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