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A GWMSIST graduate research project demonstrating iterative database administration, design and modeling.
-- Oldest Reservation
SELECT * FROM RESERVATION
WHERE Pick_Up_Date = (SELECT MIN(Pick_Up_Date) FROM RESERVATION);
-- Customer Reservations with Make and Model of Vehicle
SELECT CUSTOMER.CustomerID, CUSTOMER.CustomerFname AS First_Name, CUSTOMER.CustomerLname AS Last_Name, RESERVES.VIN, VEHICLE.Make, VEHICLE.Model
FROM (((CUSTOMER
INNER JOIN RESERVATION ON CUSTOMER.CustomerID = RESERVATION.CustomerID)
INNER JOIN RESERVES ON RESERVATION.ReservationID = RESERVES.ReservationID)
INNER JOIN VEHICLE ON RESERVES.VIN = VEHICLE.VIN);
-- /*Maintenance Count by Employee*/
SELECT EMPLOYEE.EmployeeID, EMPLOYEE.EmployeeFname AS First_Name, EMPLOYEE.EmployeeLname AS Last_Name, COUNT(MAINTENANCE_LOG.Maintenance_ID) AS Maintenance_Count
FROM EMPLOYEE
INNER JOIN MAINTENANCE_LOG ON EMPLOYEE.EmployeeID = MAINTENANCE_LOG.EmployeeID GROUP BY EMPLOYEE.EmployeeID;
-- /*Sum of Rental Office Reservation by Sales Descending*/
SELECT SUM(RESERVATION.Total) AS Total_Sales,RENTAL_OFFICE_LOCATION.RentalOfficeID FROM RESERVATION
INNER JOIN RENTAL_OFFICE_LOCATION ON RESERVATION.RentalOfficeID = RENTAL_OFFICE_LOCATION.RentalOfficeID GROUP BY RESERVATION.RentalOfficeID ORDER BY SUM(RESERVATION.Total) DESC;
-- /*Sum of Vehicle Sales Descending*/
SELECT VEHICLE.Year, VEHICLE.Make, VEHICLE.Model, RESERVES.VIN, SUM(RESERVATION.Total) AS TOTAL
FROM ((VEHICLE
INNER JOIN RESERVES ON VEHICLE.VIN = RESERVES.VIN)
INNER JOIN RESERVATION ON RESERVES.ReservationID = RESERVATION.ReservationID) GROUP BY VEHICLE.VIN ORDER BY SUM(RESERVATION.Total) DESC;
-- This query will count all records within the Daily_Rate column using the count-function returning the number of records within a table
-- grouped by RentalOfficeID from the Reservation-table, which will then be displayed as an alias-table entitled, "Number of rates per location."
SELECT Daily_Rate, count(*) AS "Number of rates per location"
FROM RESERVATION
GROUP BY RentalOfficeID;
-- This query will count all of the employed positions by selecting the Title Column from the Employee-table using the COUNT method in conjucnction with the DISTINCT method to effectively
-- count all unique last-names then grouping the count of unique last names corresponding to those employee-positions by Title from the EMPLOYEE-Table displayed in an alias-table "COUNT OF EMPLOYEES."
SELECT TITLE AS "TITLE", COUNT(DISTINCT EmployeeLNAME)
AS "Number of employee-positions"
FROM EMPLOYEE GROUP BY TITLE;
-- The query utilizes the SOUNDEX-method to find a customer that sounds phoentically similar to "Zitanna" (e.g. "Find name that sounds like using Zitanna").
-- According to Wikipedia, "SOUNDEX was developed in 1985 by genealogist Gary Mokotoff and later improved by genealogist Randy Daitch because of problems they encountered
-- while trying to apply the Russell Soundex to Jews with Germanic or Slavic surnames (such as Moskowitz vs. Moskovitz or Levine vs. Lewin)." (https://en.wikipedia.org/wiki/Soundex)
SELECT CustomerFName
FROM CUSTOMER
WHERE SOUNDEX(CustomerFName) = SOUNDEX('Zitanna');
-- This query will display the total-revenue collected per state by utiliziing an implicit-join format in addition to alias tables to effectively
-- display the total-revenue collected by state corresponding to the "RentalOfficeID" column contained within the two separate tables,
-- joining or "zipping-up" the data separated between the tables. According to OracleSQL blog-spot, the "implicit join notation" simply lists the tables for joining (http://sql-plsql.blogspot.com/2011/02/explicit-implicit-sql-joins.html)
SELECT STATE, Total
FROM RENTAL_OFFICE_LOCATION r,
RESERVATION i
WHERE r.RentalOfficeID=i.RentalOfficeID
ORDER BY Total;
-- The query should only display the models within the above range, which this case should be two different
-- makes and the two corresponding models accordingly: "available make and models with mileage at least 10,000 miles but less than 20,000 miles."
SELECT Make, Model
FROM VEHICLE
WHERE Mileage >= 10000
AND Mileage < 20000;
/*Report shwoing Customer Information, Reservation Information, and Vehicle Information */
SELECT RESERVATION.ReservationID,CUSTOMER.CustomerFName AS FirstName, CUSTOMER.CustomerLName AS LastName,
CUSTOMER_PHONE_NO.CustomerPhoneNo AS PhoneNumber, RESERVATION.Pick_Up_Date, RESERVATION.Total as RentalPrice,
RENTAL_OFFICE_LOCATION.RentalOfficeID AS RentalLocation, VEHICLE.VIN AS VehicleInfo
FROM CUSTOMER, RESERVATION, CUSTOMER_PHONE_NO, RENTAL_OFFICE_LOCATION, VEHICLE, RESERVES
WHERE CUSTOMER.CustomerID = RESERVATION.CustomerID AND
CUSTOMER_PHONE_NO.CustomerID = CUSTOMER.CustomerID AND
RENTAL_OFFICE_LOCATION.RentalOfficeID = RESERVATION.RentalOfficeID AND
VEHICLE.VIN = RESERVES.VIN AND
RESERVATION.ReservationID = RESERVES.ReservationID
ORDER BY ReservationID;
/* Show prices of reservations with the accessory cost added */
SELECT RESERVATION.ReservationID, (RESERVATION.Total + ACCESSORY.Cost) AS TotalCost, CustomerLName AS LastName
FROM RESERVATION, INCLUDES, ACCESSORY, CUSTOMER
WHERE RESERVATION.ReservationID = INCLUDES.ReservationID AND
INCLUDES.SerialNumber = ACCESSORY.SerialNumber AND
CUSTOMER.CustomerID = RESERVATION.CustomerID
ORDER BY RESERVATION.ReservationID;
/*Vehicle Age with model and make*/
SELECT VEHICLE.LicensePlate, VEHICLE.Make, VEHICLE.Model, (YEAR(RESERVATION.Pick_Up_Date) - VEHICLE.Year) AS VehicleAge
FROM VEHICLE, RESERVES, RESERVATION
WHERE RESERVATION.ReservationID = RESERVES.ReservationID AND
VEHICLE.VIN = RESERVES.VIN;
/* Employee count by rental office */
SELECT RENTAL_OFFICE_LOCATION.RentalOfficeID, RENTAL_OFFICE_LOCATION.City AS Location, COUNT(EMPLOYEE.EmployeeID) AS EmployeeCount
FROM RENTAL_OFFICE_LOCATION, EMPLOYEE, EMPLOYING
WHERE RENTAL_OFFICE_LOCATION.RentalOfficeID = EMPLOYING.RentalOfficeID AND
EMPLOYING.EmployeeID = EMPLOYEE.EmployeeID
GROUP BY RENTAL_OFFICE_LOCATION.RentalOfficeID;
/*Show vehicles with maintenance record*/
SELECT MAINTENANCE_LOG.Maintenance_ID, MAINTENANCE_LOG.Maintenance_Date, MAINTENANCE_LOG.Maintenance_Procedure,
VEHICLE.LicensePlate, VEHICLE.Model, EMPLOYEE.EmployeeID, EMPLOYEE.EmployeeLName AS LastName
FROM MAINTENANCE_LOG, VEHICLE, EMPLOYEE
WHERE MAINTENANCE_LOG.EmployeeID = EMPLOYEE.EmployeeID AND
MAINTENANCE_LOG.VIN = VEHICLE.VIN;
/*Reservation Count by Office Location*/
SELECT RESERVATION.RentalOfficeID,RENTAL_OFFICE_LOCATION.City,RENTAL_OFFICE_LOCATION.State,COUNT(RESERVATION.RESERVATIONID) AS RESERVATIONCOUNT
FROM RESERVATION,RENTAL_OFFICE_LOCATION,RESERVES
WHERE RESERVATION.RentalOfficeID = RENTAL_OFFICE_LOCATION.RentalOfficeID
AND RESERVATION.ReservationID = RESERVES.ReservationID
GROUP BY RENTAL_OFFICE_LOCATION.RentalOfficeID;
/*Customer Accessory Selection*/
Select RESERVATION.ReservationID,CUSTOMER.CustomerID,CUSTOMER.CustomerFName AS FirstName,CUSTOMER.CustomerLName AS LastName,RENTAL_OFFICE_LOCATION.City,RENTAL_OFFICE_LOCATION.State,ACCESSORY.Type,ACCESSORY.QUANTITY
FROM RESERVATION, INCLUDES, ACCESSORY, CUSTOMER, RENTAL_OFFICE_LOCATION
WHERE RESERVATION.ReservationID = INCLUDES.ReservationID AND
INCLUDES.SerialNumber = ACCESSORY.SerialNumber AND
CUSTOMER.CustomerID = RESERVATION.CustomerID AND
RESERVATION.RentalOfficeID = RENTAL_OFFICE_LOCATION.RentalOfficeID
ORDER BY CUSTOMER.CustomerLName;
/*Number of Rental Days*/
SELECT RESERVATION.ReservationID,VEHICLE.VIN,VEHICLE.MAKE,VEHICLE.MODEL,DATEDIFF(RESERVATION.Pick_Up_Date,RESERVATION.Return_Date) AS NumOfRentalDays
FROM RESERVATION,VEHICLE,RESERVES
WHERE RESERVATION.ReservationID = RESERVES.ReservationID
AND RESERVES.VIN = VEHICLE.VIN;
-- This query will pull employee information, and group the results by their last name.
SELECT EmployeeID, EmployeeLName, EmployeeFName
FROM EMPLOYEE
GROUP BY EmployeeLName;
-- This query will pull vehicle and customer identification information from existing reservations, and display them in order based on the total cost of the reservation.
SELECT VIN, CustomerID, Total
FROM RESERVES, RESERVATION
WHERE RESERVES.ReservationID=RESERVATION.ReservationID
ORDER BY Total;
-- This query will pull all rows from the maintenance log, and will order them by date from most recent to oldest.
SELECT *
FROM MAINTENANCE_LOG
ORDER BY Maintenance_Date;
-- This query will pull reservation date and cost information, and will display it organized by office location.
SELECT RentalOfficeID, Pick_Up_Date, Return_Date, Daily_Rate, Total
FROM RESERVATION
GROUP BY RentalOfficeID;
-- This query will list each accessory type and its related cost, and will organize the data in descending order by said cost.
Select Type, Cost
FROM ACCESSORY
ORDER BY Cost DESC;
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