数据建模 Database Modeling:概念 (Conceptual) vs 逻辑 (Logical) vs 物理数据 (Physical) 模型 数据建模是一种使用实体关系图(ER图)记录软件系统的技术,实体关系图是公司数据库表中数据结构的表示。它是公司业务需求的非常有力的表达。数据模型有多种用途,从高级概念模型、逻辑到物理数据模型,通常由实体关系图表示...
Logical data models and physical data models are two fundamentally different approaches to structured data modeling. One is an abstract representation of data that emphasizes structure and relationships without regard for physical implementation, while the other is a tangible representation that describes ho...
Contrasting elements of logical vs. physical DFDs Data flow diagrams are composed of four elements: external entities, processes, data stores and data flows. But the elements represent different perspectives in logical DFDs than in physical DFDs. ...
Data flow diagrams (DFDs) are categorized as either logical or physical. A logical DFD focuses on the business and how the business operates. It describes the business events that take place and the data required and produced by each event. On the other hand, a physical DFD shows how the ...
logical vs. physical Dictionary Thesaurus Medical Legal Financial High-level versus low-level. Logical implies a higher view than the physical. Users relate to data logically by data element name; however, the actual fields of data are physically located in sectors on a disk. For example, to ...
Conceptual vs Logical vs Physical ERD Databases are the backbone of modern information systems, serving as repositories for organized and structured data. When designing a database, it’s crucial to follow a structured approach that involves three distinct levels: conceptual, logical, and phys...
logical vs. physical data modeling Conceptual, logical, and physical data models each serve a key function in the data modeling process. A conceptual model provides a high-level system overview, focusing on the main entities and relationships without going into technical details. A logical model ...
The three levels of data modeling, conceptual data model, logical data model, and physical data model, were discussed in prior sections. Here we compare these three types of data models. The table below compares the different features: Feature...
Synonyms for logical vs. physical in Free Thesaurus. Antonyms for logical vs. physical. 59 synonyms for partition: screen, wall, barrier, divider, room divider, division, splitting, dividing, separation, segregation, severance, separate, screen... What
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