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...
Eliminating Most Logical and Physical Data Modeling Consider thelogical data modelfor data integration layers that the hyper generalized paradigm utilizes, as shown in the top portion ofFigure 15.1. That diagram depicts the logical data model for anyenterprise data warehousebuilt using this approach, ...
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...
Data modeling, a process that supports efficient database design and management, involves three stages: conceptual, logical, and physical. The first stage, the conceptual model, defines high-level entities and relationships. The second stage, the logical model, adds technical detail like attributes,...
Proper database design and management requires both logical and physical data modeling; however, data professionals should understand when to use one over the other, as each model has its own ideal use cases and scenarios. Use Cases for Logical Data Models Logical data models are better-suited ...
Unified modeling language,Data models,NoSQL databases,Relational databases,Scalability,Computational modelingTraditional relational database design uses conceptual, logical, and physical modeling based on Peter Chen's methods. UML (Unified Modeling Language), though being a set of software development tools...
Data modeling (data modelling)is the process of creating a data model for the data to be stored in a database. This data model is a conceptual representation of Data objects, the associations between different data objects, and the rules. ...
Eliminating Most Logical and Physical Data Modeling Consider thelogical data modelfor data integration layers that the hyper generalized paradigm utilizes, as shown in the top portion ofFigure 15.1. That diagram depicts the logical data model for anyenterprise data warehousebuilt using this approach, ...
Therefore, when developing an application, you should create a good data model from the start. However, even the best logical model can’t help when the physical implementation is bad. It is also important to know how SQL Server stores and accesses data, and how to optimize the data access...
adj.+n. logical thinking,logical sequence,logical connection,logical extension,logical analysis 权威英汉双解 英汉 英英 网络释义 logical 显示所有例句 adj. 1. 必然的;合乎情理的;合乎常理的seeming natural, reasonable or sensible 2. 符合逻辑的;按照逻辑的following or able to follow the rules of logic...