The sales and inventory management system entity model is represented by this ER diagram for sales and purchase. This sales and inventory management system entity relationship diagram depicts all of the visual instruments of database tables and the relationship between customer, sales, inventory, supplier, etc. Structure data was used in the ER diagram for sales and purchases and to manage the relationship between structured data groups of sales and inventory management system functionalities. Inventory, customer, purchasing, sales, payment, and supplier are the main entities of the sales and inventory management system. Payments, sales, suppliers, and inventory have one-to-one and one-to-many relationships.
