Each invoice has the payment details of multiple pets

This preview shows page 3 out of 3 pages.

- each invoice has the payment details of multiple pets - each payment in the invoice is paid by only one customer. EXTRA ACTIVITIES Pantas Express is a local bus company which owns a number of busses. Each bus is allocated to a particular route, although some routes may have several busses. Each route passes through a number of towns. One or more drivers are allocated to each stage of a route , which corresponds to a journey through some or all of the towns on a route. Some of the towns have a garage where busses are kept and each of the busses are identified by the registration number and can carry different numbers of passengers, since the vehicles vary in size and can be single or double-decked. Each route is identified by a route number and information is available on the average number of passengers carried per day for each route. Drivers have an employee number, name, address, and sometimes a telephone number. Answer the following questions: i. Identify the entities and attributes for Pantas Express Database. Then, determine at least six relationships among the entities by filling in the table below. Business Rule Entities Relationship Name One or more drivers are allocated to one stage of a route One stage can be allocated to one or more drivers. Drivers --- stage (M:1) allocated to ii. Based on (i), draw a conceptual Entity Relationship Diagram (ERD) for Pantas Express. - No composite in M:N relationships Page 3 of 3
Image of page 3

You've reached the end of your free preview.

Want to read all 3 pages?

  • Fall '19
  • Entity-relationship model, Bear Hill Animal Clinic, Pantas Express

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors