在SQL Oracle中设置外键时出错

Question

我查看了一下，发现执行的正确，但是执行该操作时出现以下错误：

Error report -
SQL Error: ORA-00904: "HOSPITALCODE": invalid identifier
00904. 00000 -  "%s: invalid identifier"
*Cause:    
*Action:

这是我的代码：

CREATE TABLE "Hospital" (
HospitalCode number,
HospitalName varchar(75),
HospitalStreet varchar(100),
HospitalCity varchar(75),
HospitalState varchar(12),
HospitalZip number,
HospitalPhone varchar(15),
CONSTRAINT HospitalCode_pk
PRIMARY KEY(HospitalCode));

CREATE TABLE "Doctor" (
DoctorID number,
DoctorFirstName varchar(75),
DoctorLastName varchar(75),
DoctorOfficeNumber number,
DoctorPhone varchar(10),
CONSTRAINT DoctorID_pk
PRIMARY KEY(DoctorID),
CONSTRAINT HospitalCode_fk
FOREIGN KEY (HospitalCode)
REFERENCES "Hospital" (HospitalCode));

Answer 1

您正在表doctor中创建外键HospitalCode_fk ，而不在此表中创建HospitalCode列：

CREATE TABLE "Doctor" (
 DoctorID number,
 DoctorFirstName varchar(75),
 DoctorLastName varchar(75),
 DoctorOfficeNumber number,
 DoctorPhone varchar(10),
 HospitalCode number, /* added */
 CONSTRAINT DoctorID_pk
 PRIMARY KEY(DoctorID),
 CONSTRAINT HospitalCode_fk
 FOREIGN KEY (HospitalCode)
 REFERENCES "Hospital" (HospitalCode)
);