Question

MAC 110 Chapter 9 Practice Scenic Routes Scenic Routes operates a bus company that specializes in travelling on secondary roads, rather than Interstate highways. Their slogan is: "It Takes a Little Longer, But It's Scenic." The firm needs to update its passenger reservation system. Background Data items must include reservation number, Route Number, Date, Origin, Destinations, Departure Time, Arrival Time, Passenger Name, and Seat Number. For example, leaves Monroe, VA, daily at 8:00 a.m. and arrives in Spencer, VA, 100 miles away, at 1 Scenic wants to use an alphabetic reservation code, similar to the codes that airlines use Route 97 Tasks 1. Identify the entities and their relationships. Then create an ERD for the reservations system. 2. Create 3NF table designs for the system. 3. For each of the entities identified, design tables and identify the possible candidate keys, ary 4. Use sample data to populate the fields for three records.

Answer 1

Solution: 1) ERD diagram for given reservation system יו RESERVATION PASSENGER Ila; 0* travel ROUTE reserved Here, rectangle represents an entity and triangle represents the relationship. The relationship can be "one to one", "one to many", etc...

2) The entities have below attributes: PASSENGER-(p id, p name, addres, p mobileNo) ROUTE - (I no, origin, date, destination, airival tine, departure time) RESERVATION- (r code. seat no) Third normal form only applied for every non-prime attribute of table that must be dependent on primary key. So, transitive functional dependency should be removed from the table 3NF: With sanple records: Reservation Passenger Departure Arrival origin Destinationtime Seat no |Route| Date time number name 11/11/2019 Chennai Gova 10001 8 am Anu Mith 16 01/11/2009 Delhi Chennai 4 pm 11 pm 10002

3) BUS -(b name, b-id b_type, max seat) PASSENGER - (p id, p name, address, p mobileNo) ROUTE - (r no, origin, date, destination, aival time, departure time) RESERVATION - (i code, seat no) Here, Underlined attributes are considered as primary key. Candidate keys are: p name, address in "PASSENGER" table.