Web Reference: Dec 14, 2023 · Unlike a physical data model, which is specific to a particular database system, a logical data model focuses on the business concepts and rules that govern the data. Logical data models define how data objects operate and transact in ways that business stakeholders understand. As such, they’re designed independently from the actual database that they’re deployed on later. An Entity Relationship Diagram (ERD) is a pictorial representation of the information that can be captured by a database. Such a “picture” serves two purposes. It allows database professionals to describe an overall design concisely yet accurately. An ER Diagram can be easily transformed into the relational schema. There are three components in ERD...
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