Database Management

This entity relationship diagram (ERD) assignment: Use the below Requirements Specification Document (RSD) with mission objectives as basis for developing the Conceptual Data Model. After completing the conceptual model, you need to convert it to Logical/relational model (you can use Oracle Data Modeler)

RSD- Requirements Specification Document: A Sales Department has a file of products that they provide to their customers. Each type of product has a unique product number, as well as a description, a cost and a price. The number of the product in stock and the number allocated are updated regularly. When the number in stock decreases to the reorder level, the product is reordered in a pre-decided quantity. The other operations of the Departments can be described as follows:

a. They have a file of customers. Each customer is given a unique customer number. This file also contains customer names that consist of their first and last names, and customer addresses composed of street, city and postcode and the customer telephone number. Each customer has a credit limit, which is used to validate their orders.

b. A customer may place zero, one or more orders at a time, and an order is always placed by one customer alone. Each order is identified by a unique order number. Other information as to orders includes the date due, the total price, and the status, that is, an order may be outstanding, partially delivered, or fully delivered and invoiced.

c. An order may involve one or more than one type of products, and a type of products may be involved in more than one order. For each product being ordered in an order, its quantity, total price, and status (i.e., outstanding, partially delivered, or fully delivered) are recorded and updated regularly.

Mission Objectives:

To maintain (enter, update, and delete) data on products.

To maintain (enter, update, and delete) data on customer account.

To maintain (enter, update, and delete) data on orders.

To maintain (enter, update, and delete) data on staff.

To perform searches on products.

To perform searches on customer account.

To perform searches on orders.

To perform searches on staff.

To track the status on products.

To track the status on customer account.

To track the status on orders.

To report on products.

To report on orders.

To report on customers account.

To report on staff.