Customer & Order ER Diagram
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MermaidVisualize how customers, orders, invoices, products, and delivery addresses relate in your system. This ER diagram helps clarify relationships, responsibilities, and dependencies at a glance, supporting database design and system documentation.
How to create an ER Diagram
To create an Entity-Relationship diagram, follow these steps:
01.
Identify entities
Determine the main objects in your system (e.g., Customer, Order, Product).
02.
Define relationships
Specify how entities are connected (e.g., a Customer places Orders).
03.
Add attributes
List important details for each entity (e.g., Customer Name, Order Date).
04.
Draw entity boxes
Represent each entity as a rectangle.
05.
Connect relationships
Use lines and symbols to indicate cardinality (one-to-many, many-to-many).
06.
Validate connections
Ensure all relationships reflect real business rules.
07.
Refine & simplify
Remove unnecessary complexity for clarity.
08.
Finalize & share
Use it for database design, development, or documentation.
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