The Entity Relationship Diagram (ERD) of the application is as shown in the following figure:
Let's have a quick look at the usage of the three entities displayed in the preceding figure:
The Product table is used to store information about products sold to the selected customer. The table has three fields: itemname, price, and quantity. This table is related to the Customer table via a many-to-one relationship because many customers may purchase the same product.
The Customer table is used to store information about the customer and has three data fields: name, e-mail ID, and contact number. This table is related to the Product table via a one-to-many relationship because a customer can purchase more than one product.
The MasterProduct table is used to store information about the vendor's products. This table also shows the quantity on hand for each product. The table has four fields: itemname...