Given the following business rules that describe a bookstore operation and the cardinalities involved, draw a basic Crows Foot ERD that includes cardinalities and visually describes the basic bookstore operational relationships between the business entities.
One student places one-to-many orders.
One order lists one-to-many order-items (books).
One book can be listed in any order items.
A course requires one or more books.
Remember that entities are identified by the nouns in the business rules. Each noun will become an entity. I would highly recommend you watch the video Entity Relationship Modeling in our Weekly Assigned Readings and Videos.Entity Relationship Modeling YouTube You can also create your ERD using pen and paper, so you dont need to use a modeling tool. If you do build your ERD using pen and paper make sure your entitys names and cardinality symbols are easy to read and recognize.
Here is a basic example of a business rule and how this business rule is represented in a Crows Feet Diagram:
One customer can have many customer requirements and one customer requirement belongs to only one customer.
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