Physical data modeling is the last of three stages (or types) of data modeling used to facilitate database design. It’s considered a data modeling best practice to adopt a linear approach to the stages. Starting with conceptual data modeling, organizations then progress to creating logical models, concluding with the development of a physical data model.
The three stages of データモデリング work together to provide developers with a clear picture of how business needs can be met with a new database or application. When used effectively, data modeling minimizes the time required to design a new database by clearly communicating and documenting requirements at different stages of the process.
Learn more: What Is Data Modeling?
Physical data models are where the rubber meets the road as the business objectives and concepts defined and refined in conceptual and logical data models are implemented in a specific database platform. The physical model represents the abstractions of conceptual and logical models in database-specific structures.
A physical data model introduces the distinct platform-related context missing in conceptual and logical data models. It represents the tables, columns, data types, views, and procedures within a database or other system under development. Physical data models are used directly to construct a database on a given platform.
Conceptual data models are high-level models that define the business concepts and objectives that need to be addressed with a new database or application. Conceptual models are commonly created for an audience of business stakeholders.
論理データモデル define the structure of data elements and set the relationships between them. They form the bridge between the ideas of a conceptual model and the implementation details of a physical model. They are typically created by Data Architects and Business Analysts.
A physical data model provides the blueprint used by developers to implement a new database design on the chosen platform. Previous data modeling steps are more abstract and usually platform-agnostic. The physical model represents the culmination of a data modeling initiative and defines the elements identified in the preceding modeling steps so they can be implemented in a selected database platform.
Attempting to go directly from the more abstract models of the conceptual and logical stages to a concrete implementation risks missing details that negatively impact the final database design. The construction of a physical model provides the team with the opportunity to fine-tune the data structures based on the platform in which they will be implemented. As the final stage of the modeling process, it is critical to its ultimate success.
During the development of the physical データモデル, it may become apparent that the wrong database platform has been chosen for the implementation of the business objectives. This is another reason not to skip physical data modeling, as it will be far less disruptive to identify this issue before implementation efforts have gone too far.
Constructing a physical data model involves representing the concepts, entities, and relationships identified in previous modeling stages so they can be applied to a specific database platform chosen by the team. Some of the activities performed during the creation of a physical data model include:
The abstract and platform-independent data structures defined in a logical model take form in a physical model based on the database that will be used for its implementation. While earlier data modeling stages are not necessarily concerned with details, a physical model delves into the characteristics of each entity and relationship so they can be implemented on the selected platform.
ER/Studio offers a suite of data modeling tools that enables an iterative approach to creating conceptual, logical, and physical data models for more effective database development. The three versions of the tool handle all phases of data modeling.
Business Architect helps teams turn business objectives into conceptual data models. The tool allows relationships between people, processes, and data to be mapped efficiently so they can inform database design.
ER/Studio Data Architect furnishes the functionality required to create and manage logical and physical data models.
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ER/Studio Enterprise Edition features a shared model repository that keeps teams on the same page and promotes data modeling consistency.
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Organizations can improve their data modeling capabilities and develop databases and other systems that define a data-driven company with ER/Studio.
デモを予約する to explore how ER/Studio helps you build platform-specific data models that go beyond diagrams—driving real implementation, governance, and consistency across teams.
A physical data model defines how your data will be structured and implemented on a specific database platform, including tables, columns, indexes, and constraints.
Logical models are platform-agnostic and focus on structure and relationships, while physical models map those relationships to the technical specifics of a chosen database.
It reduces risk by ensuring that platform limitations and business requirements are fully accounted for before development begins—avoiding costly mistakes later.
ER/Studio Data Architect provides robust support for building and maintaining physical data models, including automation, platform-specific features, and team collaboration.
Yes. ER/Studio supports a seamless transition between modeling stages, allowing you to evolve logical designs into detailed physical models without starting from scratch.
