The request
“Create an inventory management ERD with Category, Product, Warehouse, Inventory, Supplier, PurchaseOrder, and PO_Line tables, the shown keys and attributes, products in categories, inventory by warehouse and product, and purchase orders with suppliers and line items.”
Then tryAdd stock transfers.Add inventory adjustments.
What is in this drawing
Read the decisions behind it.
01
Using composite primary key for Inventory (warehouse_id, product_id) to ensure one record per product per warehouse.
02
Separating Product and Category to allow categorization.
When designing a system for retail, wholesale, or manufacturing inventory tracking with multiple locations.
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