Petrie Electronics Case

Categories: Electronics

1. The entities Report, Purchase, and Employee could be added. Report consolidates the account details of a customer. It involves recent purchases, coupons history and points summary. Purchase shows a record of what the customer buys. It logs the coupon usage, list of products purchased and the date of purchase. Employee would be the person working for Petrie Electronics and currently monitoring the transactions and services. 2. Coupon- special promotion created for a specific customer. Customer- someone who buys products.

Product- an item made available for sale.

Promotion- a special incentive provided to the customer.
Service- a job performed by one of Petrie’s associates.
Transaction- record that a particular product or service was sold to a specific customer. Purchase- a unique number used to identify a purchase.
3. Coupon_ID
Each identifier was chosen for the following reasons:
Must be a noun
Follows a standard format
Similar but distinguishing names
States what the attribute is and why it is important

4. These are drawn in problem 1 in the dia diagram. One-to-many includes customer to coupon, customer to purchase, customer to transaction, product to purchase and employee to transaction. Zero-to-many includes customer to promotion and product to transaction. Customer to report is a one-to-one.

5. The entity Employee does not play an important role in Petrie’s case. It is necessary for an employee to be present to make changes to a transaction. Considering an ER diagram design from a database point of view, the transactions are monitored by the database admin.

Get to Know The Price Estimate For Your Paper
Number of pages
Email Invalid email

By clicking “Check Writers’ Offers”, you agree to our terms of service and privacy policy. We’ll occasionally send you promo and account related email

"You must agree to out terms of services and privacy policy"
Write my paper

You won’t be charged yet!

The absence of this entity does not have any great consequence.

7.Coupon_Expiry_Date, Transaction_Date, Report_Date, Purchase_Date, Promotion_Expiry Date.

Attributes must be kept to keep track of historic time and maintain records for later reference.

Updated: Jul 06, 2022
Cite this page

Petrie Electronics Case. (2016, Apr 28). Retrieved from

Petrie Electronics Case essay
Live chat  with support 24/7

👋 Hi! I’m your smart assistant Amy!

Don’t know where to start? Type your requirements and I’ll connect you to an academic expert within 3 minutes.

get help with your assignment