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1. • • An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships that can exist between entities (instances of those entity types).
     en.wikipedia.org/wiki/Entity–relationship_model

     Entity–relationship model - Wikipedia

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   What is an entity relationship model?

   • An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships that can exist between entities (instances of those entity types).

   Entity–relationship model - Wikipedia

   en.wikipedia.org/wiki/Entity–relationship_model

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   What is a relationship between two entities?

   • A relationship between two entities signifies that the two entities are associated with each other somehow. For example, a student might enroll in a course. The entity Student is therefore related to Course, and a relationship is presented as a connector connecting between them.

   What is Entity Relationship Diagram (ERD)? - Visual Paradigm

   www.visual-paradigm.com/guide/data-modeling/what-is-entity-relationship-diagram

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   What is an entity relationship diagram?

   • An Entity Relationship Diagram can be drawn at three different levels: conceptual, logical, or physical. Each of these levels has a different level of detail and are used for a different purpose. Let’s see some examples. The conceptual data model shows the business objects that exist in the system and how they relate to each other.

   A Guide to the Entity Relationship Diagram (ERD) - Database Star

   www.databasestar.com/entity-relationship-diagram/

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   What is an Entity Relationship Diagram (ERD)?

   • An Entity Relationship Diagram (ERD) is a type of diagram that lets you see how different entities (e.g. people, customers, or other objects) relate to each other in an application or a database. They are created when a new system is being designed so that the development team can understand how to structure the database.

   A Guide to the Entity Relationship Diagram (ERD) - Database Star

   www.databasestar.com/entity-relationship-diagram/

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3. www.databasestar.com › entity-relationship-diagramA Guide to the Entity Relationship Diagram (ERD)

   www.databasestar.com › entity-relationship-diagram

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   Dec 21, 2023 · What is an Entity Relationship Diagram (ERD)? An Entity Relationship Diagram (ERD) is a type of diagram that lets you see how different entities (e.g. people, customers, or other objects) relate to each other in an application or a database.

4. en.wikipedia.org › wiki › Entity–relationship_modelEntity–relationship model - Wikipedia

   en.wikipedia.org › wiki › Entity–relationship_model

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   An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships that can exist between entities (instances of those entity types).

5. Videos

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     Basic Concepts of Entity-Relationship Model

     27 May 2021

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     Entity Framework - Relationships: One-to-One, Many-to-Many, One-to-Many

     17 Jan 2023

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     Introduction to Entity Relationship Diagrams (ERDs)

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6. www.visual-paradigm.com › guide › data-modelingWhat is Entity Relationship Diagram (ERD)? - Visual Paradigm

   www.visual-paradigm.com › guide › data-modeling

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   Learn what is ERD, why ERD, and how to draw ERD for database design, debugging, creation, and patching. See ERD symbols, notations, examples, and a free ERD tool.

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7. www.lucidchart.com › pages › er-diagramsER Diagram (ERD) - Definition & Overview | Lucidchart

   www.lucidchart.com › pages › er-diagrams

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   Learn what an ER diagram is, how to use it to design or troubleshoot databases, and what symbols and features it contains. Explore the history, origins and applications of ER diagrams with Lucidchart's ER diagram tool.

8. www.w3schools.in › dbms › er-modelEntity Relationship(ER) Model - W3Schools

   www.w3schools.in › dbms › er-model

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   Learn how to design and represent data using the ER model and ER diagram. The ER model is a non-technical and universal way to describe entities, attributes, relationships, and constraints in a database.

9. www.geeksforgeeks.org › introduction-of-er-modelIntroduction of ER Model - GeeksforGeeks

   www.geeksforgeeks.org › introduction-of-er-model

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   6 days ago · Learn the basics of the Entity Relationship Model (ERM), a graphical representation of the structure and logic of databases. Understand the symbols, components, and types of entities, attributes, and relationships in ER diagrams.

10. www.smartdraw.com › entity-relationship-diagramEntity Relationship Diagram (ERD) - What is an ER Diagram?

    www.smartdraw.com › entity-relationship-diagram

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    Learn what an ERD is, how to create one, and why it is useful for database design and documentation. Explore different types, symbols, and cardinality notations of ERDs with examples and tips.