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How to Use AllFusion ERwin Data Modeler R7.1 for Data Modeling


How to Use AllFusion ERwin Data Modeler R7.1 for Data Modeling




AllFusion ERwin Data Modeler R7.1 is a software tool for data modeling (data requirements analysis, database design and data warehousing) that supports various database platforms and data sources. It helps you find, visualize, design, deploy and standardize high-quality enterprise data assets.




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In this article, we will show you how to use AllFusion ERwin Data Modeler R7.1 to create a logical and a physical data model for a relational database schema. We will also explain some of the key features and benefits of this tool.


Creating a Logical Data Model




A logical data model represents the business concepts and rules of the data without specifying the physical implementation details. It consists of entities, attributes, relationships and constraints that define the structure and meaning of the data.


To create a logical data model with AllFusion ERwin Data Modeler R7.1, follow these steps:


  • Launch AllFusion ERwin Data Modeler R7.1 and create a new model.



  • Select the Logical/Physical option from the Model Type drop-down list.



  • Choose the database platform that you want to target from the Target Server drop-down list.



  • Click OK to create an empty model.



  • Add entities to your model by clicking the Entity icon on the toolbar and dragging it to the diagram area.



  • Double-click an entity to open its properties window and enter its name, definition, notes and other details.



  • Add attributes to your entities by clicking the Attribute icon on the toolbar and dragging it to an entity box.



  • Double-click an attribute to open its properties window and enter its name, definition, data type, domain, notes and other details.



  • Add relationships between your entities by clicking the Relationship icon on t