Entity Relationship Diagram (ERD) Tutorial - Part 1

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.

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00:00 Intro
0:25 What's an ERD?
1:05 How do we make an ERD?
1:25 Entities
1:54 Attributes
2:17 Relationships
2:47 Cardinalities
3:15 ERD examples
5:20 Putting it all together

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[lukeobot]

This tutorial is fantastic! Made much more sense than my college instructor!

[pjguitar]

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[kiflomberihu]

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[kereamahohua]

Thank You for your time in putting this together… it’s very helpful 👌🏽

[danurarya]

the min and max concept to apply some relationship between entity really help to understand, thanks

[bayandkheel]

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[WaliSayed]

Amazing and interesting, the explanation and introduction of cardinality.

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[luciferani]

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nice and clear explain to understand of ERDs

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[vampirekabir]

nice and clear explain to understand of ERDs
thanks