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Implementation of one conceptual data model may require multiple logical data models. The last step in data modeling is transforming the logical data model to a physical data model that organizes the data into tables, and accounts for access, performance and storage details. Data modeling defines not just data elements, but also their ...
The conceptual model is also known as the data model that can be used to describe the conceptual schema when a database system is implemented. [ citation needed ] It hides the internal details of physical storage and targets the description of entities, datatypes, relationships and constraints.
Overview of a data-modeling context: Data model is based on Data, Data relationship, Data semantic and Data constraint. A data model provides the details of information to be stored, and is of primary use when the final product is the generation of computer software code for an application or the preparation of a functional specification to aid a computer software make-or-buy decision.
Conceptual, Logical, physical IDEF1X, IE (Crow’s foot), and more Yes Yes Update database and/or update model No Oracle SQL Developer Data Modeler Logical, physical Barker, IE (Crow’s foot), and Bachman Yes Yes Update database and/or update model Yes PowerDesigner: Conceptual, logical, physical IDEF1X, IE (Crow’s foot), and more Yes Yes
The conceptual model is explicitly chosen to be independent of design or implementation concerns, for example, concurrency or data storage. Conceptual modeling in computer science should not be confused with other modeling disciplines within the broader field of conceptual models such as data modelling, logical modelling and physical modelling.
The term conceptual model refers to any model that is formed after a conceptualization or generalization process. [1] [2] Conceptual models are often abstractions of things in the real world, whether physical or social. Semantic studies are relevant to various stages of concept formation. Semantics is fundamentally a study of concepts, the ...
The unified modeling language (UML), specifically the class diagram, is commonly used for visually developing logical and physical models. Physical data model, the detailed specification of how data will be structured in memory or in files. Each of these models can be designed in one of two situations or scopes:
The data architect breaks the subject down by going through three traditional architectural stages: Conceptual - represents all business entities. Logical - represents the logic of how entities are related. Physical - the realization of the data mechanisms for a specific type of functionality.