Question

通过NOVA Oracle DB使用SQL。需要知道如何从多个表中查询并根据按最高值排序的结果排列结果。以下是几行代码来反映这三个表：

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);

和

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');

和

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');

显然，此处还有其他表格（销售人员等），但这些是查询所需的唯一表格。我要提取的查询需要显示每个模型的销售总数，按最高值排序，以及每个邮政编码的销售总数，按最高值排序。一个例子（使用上面提供的数据）看起来类似于：

MODEL    NUMBER of SALES    ZIP CODE    NUMBER OF SALES
spark    1                  20636       1  
Taurus   1                  77001       1
towncar  1                  85001       1

结果需要根据销售数量按最高值排序。我也试图通过一个SELECT查询来完成这个任务。

我已经尝试了一些想法，但还没有找到任何能够击中本垒打的东西。谢谢你的帮助！

Answer 1

看看这是不是你想要的：

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

SQL查询和从多个表中排序

1 个答案: