在Oracle SQL DB中创建表时遇到问题

您好，我已经创建了表并为其进行了事务处理。现在，我在为表创建视图时遇到问题。我试着找出错误并继续做下去，但仍然做得不好

我不熟悉SQL和堆栈溢出。 下面的代码正在创建表和事务，后面是出现错误的视图

**Create Table**


create TABLE employee

(
EmployeeID varchar2(10) PRIMARY KEY,

EmployeeName varchar2(30) NOT NULL,

Phone number(10) NOT NULL,

JobTitle varchar2(30) NOT NULL

);


create TABLE Airplane

(

AirplaneID varchar2(10) PRIMARY KEY,

Capacity number NOT NULL,

Modle varchar2(10) NOT NULL

);


create TABLE Route

(

FlightID varchar2(10) PRIMARY KEY,

Origin varchar2(20) NOT NULL,

Destination varchar2(20) NOT NULL,

ETD number(10) NOT NULL,

ETA number(10) NOT NULL

);


create TABLE Customer

(

CustomerID varchar2(10) PRIMARY KEY,

CustomerName varchar2(10) NOT NULL,

PhoneNumber number NOT NULL

);


create TABLE Maintenance

(

MaintenanceID varchar2(20) PRIMARY KEY,

MaintenanceDate date NOT NULL,

AirplaneID varchar2(10) NOT NULL,

EmployeeID varchar2(10) NOT NULL,

Location varchar2(30) NOT NULL,

FOREIGN KEY (AirplaneID) REFERENCES Airplane(AirplaneID),

FOREIGN KEY (EmployeeID) REFERENCES employee(EmployeeID)

);

create TABLE Flight

(

FlightID varchar2(10),

FlightDate date,

AirplaneID varchar2(10),

ATD number(10) NOT NULL,

ATA number(10) NOT NULL,

--FOREIGN KEY (FlightID) REFERENCES Flight(FlightID),  --check you can't do this:

FOREIGN KEY (AirplaneID) REFERENCES Airplane(AirplaneID),

CONSTRAINT PK_FlightID PRIMARY KEY (FlightID,FlightDate)

);

create TABLE Reservation

(

ReservationID varchar2(20) PRIMARY KEY,

CustomerID varchar2(10) NOT NULL,

FlightID varchar2(10) NOT NULL,

FlightDate date NOT NULL,

Fare float,

PaymentMethod varchar2(20),

CardNumber number(30) NOT NULL,

ExperationDate date,

check (PaymentMethod = 'Cash' OR PaymentMethod ='Credit' OR PaymentMethod 

='Cheque'),

FOREIGN KEY (CustomerID) REFERENCES Customer(CustomerID),

FOReIGN KEY (FlightID,FlightDate) REFERENCES Flight(FlightID,FlightDate)

);

create TABLE CrewAssignment

(

EmployeeID varchar2(10),

FlightID varchar2(10),

FlightDate date NOT NULL,

Role varchar2(20) NOT NULL,

FlightHour number(10) NOT NULL,

FOReIGN KEY (FlightID,FlightDate) REFERENCES Flight(FlightID,FlightDate),

FOReIGN KEY (EmployeeID) REFERENCES employee(EmployeeID) ,

CONSTRAINT PK_CrewAssignment PRIMARY key (FlightID,FlightDate,EmployeeID)

);

交易

insert into Route (FlightID, Origin, Destination, ETD, ETA) values

('FBN001', 'Perth', 'Singapore', '1100', '1600');

insert into Airplane (AirplaneID, Capacity, Modle) values

('FH-FBT', '350', 'Boeing767');



insert into Flight (FlightID, FlightDate, AirplaneID, ATD, ATA) values

( 'FBN001', '20 october 2014', 'FH-FBT', '1105', '1555');

insert into Flight (FlightID, FlightDate, AirplaneID, ATD, ATA) values

( 'FBN001', '20 october 2014', 'FH-FBT', '1105', '1555');

insert into Employee (EmployeeID,EmployeeName,Phone,JobTitle) values

('01', 'Martha McGee','123456', 'Pilot');

insert into Employee (EmployeeID,EmployeeName,Phone,JobTitle) values

('02','Dorothy McDonald','2211', 'Co-Pilot');

insert into Employee (EmployeeID,EmployeeName,Phone,JobTitle) values

('03','Albert','1122', 'Engineer');

insert into Employee (EmployeeID,EmployeeName,Phone,JobTitle) values

('04','Kathy Kelly','5544', 'HeadSteward');

insert into Employee (EmployeeID,EmployeeName,Phone,JobTitle) values

('05', 'Ornella', '3123', 'Steward');

insert into CrewAssignment (EmployeeID,FlightID,FlightDate, Role, FlightHour) values

('01','FBN001', '20 October 2014', 'Flight','5');

insert into CrewAssignment  (EmployeeID,FlightID,FlightDate, Role, FlightHour) values

('02','FBN001', '20 October 2014', 'Flight','5');

insert into CrewAssignment  (EmployeeID,FlightID,FlightDate, Role, FlightHour) values

('03','FBN001', '20 October 2014', 'Flight','5');

insert into CrewAssignment  (EmployeeID,FlightID,FlightDate, Role, FlightHour) values

('04','FBN001', '20 October 2014', 'Non-Flight','0');

insert into CrewAssignment  (EmployeeID,FlightID,FlightDate, Role, FlightHour) values

('05','FBN001', '20 October 2014', 'Non-Flight','0');

insert into Customer (CustomerID,CustomerName,PhoneNumber) Values

('01', 'John Smith', '81393'); 




insert into Reservation (ReservationID,CustomerID,FlightID, FlightDate,Fare,PaymentMethod,CardNumber, ExperationDate) values
('01' , '01', 'FBN001','20 October 2014', '100' , 'Cash' , '44444' , '21 Feb 2019'); 







insert into Employee (EmployeeID,EmployeeName,Phone,JobTitle) values
('06','Laurence Schreiner','007', 'Supervisor');

insert into Maintenance (MaintenanceID,MaintenanceDate, EmployeeID, AirplaneID, Location) values
('004', '21 October 2014', '06', 'FH-FBT', 'Melbourne Airport');

创建视图

视图A：  John Smith预订的所有航班，包括已飞行的航班的航班持续时间

Create View ViewA as 
Select Reservation.ReservationID,Flight.FlightID,Flight.FlightDate, Flight.ATA - Flight.ATD as DurationofFlight 
from Reservation, Customer, FLight
where Customer.CustomerName = 'John Smith' and
Customer.CustomerID = Reservation.CustomerID and
Reservation.FlightID = Flight.FlightID and
Reservation.FlightDate = Flight.FlightDate;

视图B：  2014年10月20日FBN001上未预订/可用座位的数量

Create view ViewB as 
Select Airplane.Capacity, count(Reservaion.ReservationID)
from Airplane,Reservation
where FlightID='FBN001' and FlightDate='20 October 2014'
and Flight.AirplaneID = Airplane.AirplaneID
and Flight.FlightID = Reservaton.FlightID
and Flight.FlightDate=Reservation.FlightDate;

Create vire ViewC as 
select EmployeeID, sum(FlightHour)
from CrewAssignment
where CrewAssignment.EmployeeID in
(select EmployeeNO from CrewAssignment
where FlightID = 'FBN001' and FlightDate = '20 October 2014')
group by EmployeeID;

ViewC:  2014年10月20日FBN001机组的飞行总小时数

Create view ViewB as 
Select Airplane.Capacity, count(Reservaion.ReservationID)
from Airplane,Reservation
where FlightID='FBN001' and FlightDate='20 October 2014'
and Flight.AirplaneID = Airplane.AirplaneID
and Flight.FlightID = Reservaton.FlightID
and Flight.FlightDate=Reservation.FlightDate;

Create vire ViewC as 
select EmployeeID, sum(FlightHour)
from CrewAssignment
where CrewAssignment.EmployeeID in
(select EmployeeNO from CrewAssignment
where FlightID = 'FBN001' and FlightDate = '20 October 2014')
group by EmployeeID;

视图E:  FH-FBT的维护历史记录，包括维护事件的日期和地点，是否安排了维护，以及监督员工的姓名和电话号码

  Create view ViewE as 
select Maintenance.MaintenanceDate, Maintenance.Maintenance.Location,
Employee.EmployeeName,Employee.EmployeeName 
from Maintenance, Employee
where Maintenance.AirplaneID = 'FH-FBT' and
Maintenance.EmloyeeID = Employee.EmployeeID;

这里是我为每个表得到的错误

查看A

Error starting at line : 157 in command -
create View ViewA as 
Select Reservation.ReservationID,Flight.FlightID,Flight.FlightDate, Flight.ATA - Flight.ATD as DurationofFlight 
from Reservation, Customer, FLight
where Customer.CustomerName = 'John Smith' and
Customer.CustomerID = Reservation.CustomerID and
Reservation.FlightID = Flight.FlightID and
Reservation.FlightDate = Flight.FlightDate
Error at Command Line : 157 Column : 13
Error report -
SQL Error: ORA-00955: name is already used by an existing object
00955. 00000 -  "name is already used by an existing object"
*Cause:    
*Action:

视图B

Error starting at line : 166 in command -
create view ViewB as 
Select Airplane.Capacity,count(Reservaion.ReservationID)
from Airplane,Reservation
where FlightID='FBN001' and FlightDate='20 October 2014'
and Flight.AirplaneID = Airplane.AirplaneID
and Flight.FlightID = Reservaton.FlightID
and Flight.FlightDate=Reservation.FlightDate
Error at Command Line : 172 Column : 5
Error report -
SQL Error: ORA-00904: "FLIGHT"."FLIGHTDATE": invalid identifier
00904. 00000 -  "%s: invalid identifier"
*Cause:    
*Action:

ViewC

维维

---

您正在使用

Creater

而不是

create

将

Creater

更改为

create

，它应该可以工作。请同时检查您的Spelling，您有

create vier

而不是

create view

Create view ViewE as 
select Maintainence.MaintainenceDate, Maintainence.maintainence.Description,
Employee.EmployeeName,Employee.EmployeeName 
from Maintenance, Employee
where Maintenance.AirplaneID = 'FH-FBT' and
Maintenance.EmloyeeID = Employee.EmployeeID;

sum（FlightHour）-必须使用别名命名

无效标识符-该列不存在

现有对象已在使用的名称-使用

创建或替换视图

Create view ViewE as 
select Maintainence.MaintainenceDate, Maintainence.maintainence.Description,
Employee.EmployeeName,Employee.EmployeeName 
from Maintenance, Employee
where Maintenance.AirplaneID = 'FH-FBT' and
Maintenance.EmloyeeID = Employee.EmployeeID;

---

任何其他-在尝试像这样严肃的事情之前，请阅读sql手册

有很多问题。其中一些是：

ViewB

在

WHERE

子句中引用

FLIGHT

，但

FLIGHT

不在

FROM

子句中

ViewC

的语句是

createvire

而不是

createview

ViewC

引用了

crewaSignment

中的

employeeno

，但不存在此类列

在

ViewC

中，您使用的聚合函数没有别名，因此数据库无法确定列的名称

在

ViewE

中，

EmployeeId

缺少“p”

ViewE

references

maintenance.maintenance.Description

。指定两次表名无效。此外，

维护

表中没有

说明

列

---

这些都是非常基本的问题，应该使用基本的故障排除技能来解决。发布此问题表明完全没有努力解决这些问题。

您应该编辑您的问题并确定您遇到问题的视图。你也应该提到你得到的错误。对不起，我只是第一次在这里发布。我将编辑并包含错误。只需尝试，兄弟仍有错误。我将编辑并发布每个视图的错误。我刚刚编辑并上传了我遇到的错误的问题。看到我的编辑，你会明白的。我建议你使用谷歌，看看有多少关于这些错误的例子！谢谢你的建议。我去试一试，然后麻烦地射杀那个男人。对不起，我犯了个粗心的错误。我对SQL和这里都是新手。无论如何，我已经设法纠正我的观点了。再见，谢谢。

View A:
create view ViewA as
select Reservation.ReservationID, Flight.FlightID, Flight.FlightDate, Flight.ATA - Flight.ATD as DurationOFFlight
from Reservation, Customer, Flight
where Customer.CustomerName = 'John Smith' and
Customer.CustomerID = Reservation.CustomerID and
Reservation.FlightID=Flight.FlightID and
Reservation.FlightDate=Flight.FlightDate;

View B:

create view ViewB as
select Airplane.Capacity - Reservation.ReservationID
as RemainingSeats
from Airplane, Reservation, Flight
where
Flight.FlightID = 'FBN001' and Flight.FlightDate='20 October 2014'
and Flight.AirplaneID = Airplane.AirplaneID and
Flight.FlightID = Reservation.FlightID and
Flight.FlightDate = Reservation.FlightDate;


View C:

create view ViewC as
select EmployeeID, sum(FlightHour) as Total_Hours
from CrewAssignment
where CrewAssignment.EmployeeID in
(select EmployeeID from CrewAssignment
where FlightID='FBN001' and FlightDate='20-10-2014')
group by EmployeeID;

View D:

create view ViewD as
select JobTitle, sum(FlightHour) as Total_Hours
from CrewAssignment
where CrewAssignment.EmployeeID in
(select EmployeeID from CrewAssignment
where FlightID='FBN001' and FlightDate='20-10-2014' and EmployeeID= '123456')
group by JobTitle;


View E: 

create view ViewE as
select Maintenance.MaintenanceDate,Maintenance.Location, 
Employee.EmployeeName,Employee.Empphone from Maintenance,Employee 
where Maintenance.AirplaneID = 'FH-FBT' and Maintenance.EmployeeID = Employee.EmployeeID;