create table coc (
WS_NO number(10,0) PRIMARY KEY,
last_name varchar2(30),
first_name varchar2(30),
middle_initial varchar2(1),
Email varchar2(2),
contact_no varchar2(11),
date_to_be_submitted date,
applicant_id number(10,0),
company_name VARCHAR2(50),
plant_location VARCHAR2(50),
sample_id number(10,0),
sample_name VARCHAR2(50),
parameters VARCHAR2(50),
CONSTRAINT APPLICANT_FK FOREIGN KEY (applicant_id, company_name, plant_location) REFERENCES APPLICANT (applicant_id, company_name, plant_location),
CONSTRAINT SAMPLE_FK FOREIGN KEY (sample_id, sample_name, parameters) REFERENCES SAMPLE (sample_id, sample_name, parameters));
我认为错误信息非常清楚。外键约束中提到了列,但它们没有定义。如果您希望它们引用其他内容,则需要定义它们:
create table coc (
WS_NO number(10,0) PRIMARY KEY,
last_name varchar2(30),
first_name varchar2(30),
middle_initial varchar2(1),
Email varchar2(2),
contact_no varchar2(11),
date_to_be_submitted date,
applicant_id ??,
company_name ??,
plant_location ??,
sample_id ??,
sample_name ??,
CONSTRAINT APPLICANT_FK FOREIGN KEY (applicant_id, company_name, plant_location) REFERENCES APPLICANT (applicant_id, company_name, plant_location),
CONSTRAINT SAMPLE_FK FOREIGN KEY (sample_id, sample_name, parameters) REFERENCES SAMPLE (sample_id, sample_name, plant_location)
);
列(applicant_id, company_name, plant_location)和(sample_id, sample_name, parameters)的集合必须在引用的表application和SAMPLE中设置为唯一键或主键。