[英]How to add multiples of foreign key “ORA-02270: no matching unique or primary key for this column-list”
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));
我認為錯誤消息很清楚。 您在外鍵約束中提到了列,但未定義。 如果希望它們引用其他內容,則需要定義它們:
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)
);
切記:類型必須與原始表中的類型相同。
列集(applicant_id,company_name,plant_location)和(sample_id,sample_name,參數)必須在引用的表APPLICANT和SAMPLE中設置為唯一鍵或主鍵。 通過從ALL_CONS_COLUMNS中按table_name篩選選擇,進行檢查。
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