Question

目前正致力于SSH安全shell代码，不断提供此错误代码。我已经尝试更改表名但仍然，我收到此错误。帮助！

以下是问题所在：

列出以超过任何其他产品的订单销售的产品的产品ID，产品名称和产品价格（基于订单出现次数，而不是数量）。将价格格式化为货币，并使用以下列标题：ProductID，Name，Price。
列出每个类别中价格最低的产品的类别ID，产品ID，产品名称和产品价格。将价格格式化为货币，并使用以下列标题：Cat_ID，Prod_ID，Prod_Name，Price。

以下是包含错误的代码：

SQL> --question 15
SQL> 
SQL> SELECT Pro.ProductID as ProductID, Pro.ProductName AS Name, to_char(Pro.ProductPrice,'$99.99') AS Price
  2  FROM Product_mys Pro
  3  WHERE Pro.ProductPrice = (SELECT MAX(Pro.ProductPrice)
  4  FROM OrderDetail_mys Pro);
WHERE Pro.ProductPrice = (SELECT MAX(Pro.ProductPrice)
      *
ERROR at line 3:
ORA-00904: "PRO"."PRODUCTPRICE": invalid identifier


SQL> 
SQL> --question 16
SQL> 
SQL> SELECT Cat.CatID as Cat_ID,Pro.ProductID as Prod_ID, Pro.ProductName AS Prod_Name, to_char(Pro.ProductPrice,'$99.99') AS Price
  2  FROM Category_mys Cat,Product_mys Pro
  3  WHERE Pro.ProductPrice = (SELECT MIN(Pro.ProductPrice)
  4  FROM OrderDetail_mys Pro);
WHERE Pro.ProductPrice = (SELECT MIN(Pro.ProductPrice)
      *

这些是我用于值

CREATE TABLE Dept_mys (
 DeptID     Number(3)       NOT NULL,
 DeptName   VARCHAR(20)     NOT NULL,
 PRIMARY KEY    (DeptID) 
 ) ;

CREATE TABLE Commission_mys (
 CommClass  CHAR(1)         NOT NULL,
 CommRate   Number(2,2)     NOT NULL,
 PRIMARY KEY    (CommClass) 
 ) ;

CREATE TABLE Category_mys (
 CatID      Number(3)       NOT NULL,
 catName    VARCHAR(20)     NOT NULL,
 PRIMARY KEY    (CatID) 
 ) ;

CREATE TABLE SalesRep_mys (
 SalesRepID NUMBER(4)       NOT NULL,
 SalesRepFName  VARCHAR(20)     NOT NULL,
 SalesRepLName  VARCHAR(20)     NOT NULL,
 DeptID         NUMBER(3)       NOT NULL,
 CommClass      CHAR(1)         NOT NULL,
 PRIMARY KEY    (SalesRepID),
 FOREIGN KEY    (DeptID)    REFERENCES Dept_mys,
 FOREIGN KEY    (CommClass) REFERENCES Commission_mys 
 ) ;

CREATE TABLE Customer_mys (
 CustID     CHAR(5)         NOT NULL,
 CustFName  VARCHAR(20)     NOT NULL,
 CustLName  VARCHAR(20)     NOT NULL,
 CustPhone  CHAR(10),
 SalesRepID NUMBER(4)       NOT NULL,
 PRIMARY KEY    (CustID),
 FOREIGN KEY    (SalesRepID)    REFERENCES SalesRep_mys
 ) ;

CREATE TABLE Order_mys (
 OrderID    NUMBER(3)       NOT NULL,
 OrderDate  DATE            NOT NULL,
 CustID     CHAR(5)         NOT NULL,
 PRIMARY KEY    (OrderID),
 FOREIGN KEY    (CustID)    REFERENCES Customer_mys
 ) ;

CREATE TABLE Product_mys (
 ProductID      NUMBER(3)       NOT NULL,
 ProductName    VARCHAR(30)     NOT NULL,
 CatID          Number(3)       NOT NULL,
 PRIMARY KEY    (ProductID),
 FOREIGN KEY    (CatID)     REFERENCES Category_mys
 ) ;

CREATE TABLE OrderDetail_mys (
 OrderID    NUMBER(3)       NOT NULL,
 ProductID  NUMBER(3)       NOT NULL,
 ProductQty NUMBER(4)       NOT NULL,
 ProductPrice   NUMBER(6,2)     NOT NULL,
 PRIMARY KEY    (OrderID, ProductID),
 FOREIGN KEY    (OrderID)   REFERENCES Order_mys,
 FOREIGN KEY    (ProductID)     REFERENCES Product_mys
 ) ;

Answer 1

您尝试使用ProductPrice中没有该列的Product_mys。

SQL无效标识错误.....？

1 个答案: