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BITP2313 Module 8 - Distributed Databases Exercise

EasyDrive School Lab Exercise
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    Lab Exercises 1.   (adapated from Connolly & Begg, 2010): The EasyDrive School of Motoring Case Study Company Overview The EasyDrive School of Motoring was established in Glasgow in 1992. Since then, the school has grown steadily and now has several offices in most of the main cities of Scotland. However, the school is now so large that more and more administrative staff are being employed to cope with the ever-increasing amount of paperwork. Furthermore, the communication and sharing of information between offices, even in the same city, is poor. The Director of the School, Dave MacLeod, feels that too many mistakes are being made and that the success of the school will be short-lived if he does not do something to remedy the situation. He knows that a database could help in part to solve the problem and has approached you to help in creating a database system to support the running of the EasyDrive School of Motoring. The Director has provided the following brief description of how the EasyDrive School of Motoring operates. Data Requirements Each office has a manager (who tends to also be a Senior Instructor), several Senior Instructors, Instructors, and administrative staff. The Manager is responsible for the day-to-day running of the office. Clients must first register at an office, which includes completion of an application form, which records their personal details. Before the first lesson, a client is requested to attend and interview with an Instructor to assess the needs of the client and to ensure that the client holds a valid  provisional license. A client is free to ask for a particular Instructor or to request that an Instructor be changed at any stage throughout the process of learning to drive. After the interview, the first lesson is booked. A client may request individual lesson or book a block of lessons for a reduced fee. An individual lesson is for one hour, which begins and ends at the office. A lesson is with a particular Instructor in a  particular car at a given time. Lessons can start as early as 8:00 AM and as late as 8:00 PM. After each lesson, the instructor records the progress made by the client and notes the mileage used during the lesson. Each office has a pool of cars, which are adapted for the purposes of teaching. Each car is allocated to a particular Instructor. The cars are inspected at regular intervals for maintenance or repairs. Once ready, a client applies to take a driving test at the local government testing centre. To obtain a full driving license, the client must pass both the driving and written parts of the tests. After the test is completed, the client returns to the school and the test results are recorded.    2 Query Transactions (Sample) The Director has provided some examples of typical queries that the database system for the EasyDrive School of Motoring must support: a)   The name and telephone number of the manager of each office.  b)   The full address of all offices in the city of Glasgow. c)   The names of all female instructors based in the Bearsden office in the city of Glasgow. d)   The total number of staff at each office. e)   The total number of clients at each office. f)   The lessons for a given instructor. g)   The employee numbers and names of staff who are over 55 years old. h)   The registration number of the cars used at the Bearsden office in the city of Glasgow. i)   The names of all clients who passed the driving test in January 2005.  j)   The names of all clients that have taken the driving test more than three times. k)   The average number of miles driven during a lesson. l)   The number of administrative staff at each office. i.   Draw an ER diagram to represent the current system. ii.   Using the ER diagram, produce a distributed database design for this system that include a suitable fragmentation schema for the system.
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