SQL Query and Sort From Multiple Tables - sql

Question

Working with SQL via a NOVA Oracle DB. Need to know how to query from multiple tables and arrange results based on being sorted by the highest values. Here are a few lines of code to reflect the three tables:
INSERT INTO VEHICLES
(vehicleVIN,vehicleType,vehicleMake,vehicleModel,vehicleWhereFrom,vehicleWholesaleCost,vehicleTradeID)
VALUES
('147258HHE91K3RT','compact','chevrolet','spark','Maryland',20583.00,NULL);
INSERT INTO VEHICLES
(vehicleVIN,vehicleType,vehicleMake,vehicleModel,vehicleWhereFrom,vehicleWholesaleCost,vehicleTradeID)
VALUES
('789456ERT0923RFB6','Midsize','ford','Taurus','washington, d.c.',25897.22,1);
INSERT INTO VEHICLES
(vehicleVIN,vehicleType,vehicleMake,vehicleModel,vehicleWhereFrom,vehicleWholesaleCost,vehicleTradeID)
VALUES
('1234567890QWERTYUIOP','fullsize','Lincoln','towncar','Virginia',44222.10,NULL);
AND
INSERT INTO SALES
(saleID,grossSalePrice,vehicleStatus,saleDate,saleMileage,customerID,salespersonID,vehicleVIN)
VALUES
(1,25987.28,'sold',date '2012-10-15',10,1,1,'147258HHE91K3RT');
INSERT INTO SALES
(saleID,grossSalePrice,vehicleStatus,saleDate,saleMileage,customerID,salespersonID,vehicleVIN)
VALUES
(2,29999.99,'sold',date '2012-10-17',50087,2,2,'789456ERT0923RFB6');
INSERT INTO SALES
(saleID,grossSalePrice,vehicleStatus,saleDate,saleMileage,customerID,salespersonID,vehicleVIN)
VALUES
(3,47490.88,'sold',date '2012-11-05',30,3,3,'1234567890QWERTYUIOP');
AND
INSERT INTO CUSTOMERS
(customerID,customerFirName,customerLasName,customerMiName,customerStreet,customerState,customerCity,customerZip)
VALUES
(1,'Regorna','Trasper','J','11111 Address Way','Maryland','Hollywood','20636');
INSERT INTO CUSTOMERS
(customerID,customerFirName,customerLasName,customerMiName,customerStreet,customerState,customerCity,customerZip)
VALUES
(2,'Bob','Seagram','A','22222 Seagram Lane','Texas','Houston','77001');
INSERT INTO CUSTOMERS
(customerID,customerFirName,customerLasName,customerMiName,customerStreet,customerState,customerCity,customerZip)
VALUES
(3,'Sally','Anderson','P','33333 Pheonix Drive','Arizona','Pheonix','85001');
Obviously there are other tables that come into play here (salesperson, etc.), however these are the only tables needed for the query. The query I want to pull needs to show the total count of sales for each model, sorted by the highest values, and the total count of sales for each zip code, sorted by the highest values. An example (using the data provided above) would look similar to this:
MODEL NUMBER of SALES ZIP CODE NUMBER OF SALES
spark 1 20636 1
Taurus 1 77001 1
towncar 1 85001 1
The results need to be sorted by highest values, based on the number of sales. I'm also trying to accomplish this via a single SELECT query.
I've tried some ideas, but haven't been able to find anything that hits the home run yet. Thanks for the help!

Answer 1

See if this is what you're after:
SELECT DISTINCT v.VEHICLEMODEL, COUNT(*) OVER (PARTITION BY s.VEHICLEVIN) "CAR_SALES"
, c.CUSTOMERZIP, COUNT(*) OVER (PARTITION BY c.CUSTOMERZIP )"TOTAL_SALES_AT_ZIP"
FROM SALES s, VEHICLES v, CUSTOMERS c
WHERE s. VEHICLEVIN = v. VEHICLEVIN
and c. CUSTOMERID = s. CUSTOMERID
ORDER BY 2 DESC , 4 DESC