Home Uncategorized Entity Relationship Diagram (ERD) Tutorial – Part 1

Entity Relationship Diagram (ERD) Tutorial – Part 1

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Entity Relationship Diagram (ERD) Tutorial – Part 1

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Learn how to create an Entity Relationship Diagram in this tutorial. We provide a basic overview of ERDs and then gives step-by-step training on how to make an ER diagram with correct cardinality.

Entity Relationship Diagrams are comprised of 3 main categories: entities, attributes, and relationships. Entities are objects or concepts that are associated with important data—like a customer, order, or product. Attributes represent properties or traits of an entity, such as a customer’s phone number or home address. Relationships demonstrate the link between entities.

Another main aspect of of ERD’s is cardinality, which further defines the relationship between entities in a numerical way. Certain symbols signify the minimum and maximum relationship between different entities.

Additional ERD information: l


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