Vehicle Mart is a vehicle sale and rental agency, which sells and lets vehicles of various customers to customers. The head office of Vehicle Mart is in London but looking to expand across the UK. The agency is using a basic database system to maintain its data, but due to technological advancements and a lack of capturing the market. In addition to London, they recently opened two new branches in Manchester and Birmingham. Assume they hire you as a technical consultant for replacing the old-fashioned file system with the new database system.
The agency deals with the following Types: Sedan, Coupe, Crossover, Hatchback, Pickup, Van, and SUV. They cover the following Cities: London, Manchester, Bolton, Liverpool, Leicester, and Birmingham. The price of each vehicle is maintained as the current price where a time/date object is associated with each change. We assume there is one change of price every fortnight.
In each branch, the agency has a receptionist, who is responsible for guiding the customers and booking their timeslot for either Purchasing or Leasing the Vehicle. The customers can book their timeslots either online/by phone or in person. The agency intends to use an online system where customers can reserve vehicles online, but the process will need to be completed in person through an agent. You are required to design Use Case and ERD, and then, implement the system using SQL.
The agency has a couple of Agents, who assist customers with their queries and transactions. The system will have the Agent details where each Agent has different levels of dealer namely bronze, silver, and gold. There are a total of twelve Agents and two are assigned in each city and required to enter their login details in order to gain access to the system.
The Agent’s level is determined based on the number of bookings, where if an Agent has, equal to or more than, 10 bookings, it is categorized as Gold, more than 4, but less than, 10 as Silver, and Bronze otherwise. These Agents give a quote with recommendations to customers to buy or rent; where customers have the right to accept/reject them.
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The agency has security protocols, such as antivirus and firewall, which are handled by an IT practitioner. There is a technical consultant, who deals with prediction modeling, and they will develop a prediction system in the future.
Each branch has a CTO who keeps an eye on the total vehicles sold/rented and loss/gain. Customers cannot directly interact with the CTO, the company CEO who resides in the London office (HO) and manages the overall profit of the agency.
Queries:
Show the current price of Sedans in all the Cities
Show the largest price value from all models associated with London and Manchester
Show minimum price for London vehicles (from all models)
Find an Agent who has the maximum number of timeslots
Find the customer which booked the maximum number of timeslots
Show all models having prices higher than average for models in Birmingham
Update the price for all models, for London and Manchester, for today, assuming they want to give an offer of 80 GBP per vehicle
Show the maximum price sold from all Gold and Bronze Agents, for all models
Trigger: Create a trigger that places the customers, which have been deleted into a customer table. This allows records to be maintained while improving query times for existing customers.
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