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...
Physical – the “how” of the implementation Each level of conceptual, physical, and logical data models can involve different roles from your team. Conceptual Data Model The conceptual data model can be thought of as the “white board” data model. This model does not go into the “how”...
Part 1 of this series covered the three steps of data modeling: conceptual, logical, and physical. Common Data Models After you’ve defined a conceptual model, the next step is to start building a logical data model. This is still too early to pick a specific technology or vendor. The lo...
概念模型 Conceptual Mode 逻辑模型 Logical Model 物理模型 Physical Model Syntax error in textmermaid version 10.9.0 2.Conceptual Model - ER Model Is the most popular conceptual model Gives us a language to specify what information the db must hold what are the relationships among components of tha...
自下而上是另一种方式,从物理数据模型开始。数据建模同样有助于帮助用户提前定义好KPI和度量指标。同时数据建模还涉及到几类数据模型,分别是概念数据模型(Conceptual Data Model),逻辑数据模型(Logical Data Model)和物理数据模型(Physical Data Model)。 一、方法论...
TheKashlev Data Modeleris a Cassandra data modeling tool that automates the data modeling methodology described in this chapter, including identifying access patterns; conceptual, logical, and physical data modeling; and schema generation. It also includes model patterns that you can optionally leverage...
A sits between the physical and conceptual levels and allows for the logical representation of data to be separate from its physical storage. This blog post will primarily discuss logical data modeling. Data Models Describe Business Entities and Relationships Data models are made up of entities, whi...
Thelogical data modelrefers to all the abstract information, such as data attribute relationships and concepts associated with business, but it doesn’t have detailed information. In contrast, the physical data model has all the information, such as column names,data types, values, descriptions, et...
3.1.8 Enterprise Data Model An enterprise data model is a type of integration model that covers all (well, probably most in practice) of the data of an enterprise. Your Enterprise Architecture may include enterprise-wide data models that are also conceptual, logical, or physical data models. ...
Logical data models don’t specify any technical system requirements. Physical data models: The physical data model is the most detailed and specific of the 3. It defines the actual implementation of the database, including table structures, indexes, storage and performance considerations. It ...