• Northwind is a fictional database containing sales data for Northwind Traders.
• Northwind Traders is a company specialised in exporting and importing foods.
• The structure of the database is shown below.

• Database model contains the following eight tables:

• categories: Product categories
• suppliers: Suppliers and vendors of Northwind
• employees: Employees working in Northwind traders
• customers: Customers of Northwind buying products
• shippers: Shippers who ship the products from traders to the end-customers
• orders: Customer orders with order date
• orderdetails: Customer orders with product quantities
• products: Products that can be ordered by customers