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遇到ORA-02270錯誤。一遍又一遍地檢查主鍵和外鍵後,我找不到問題所在。ORA-02270 - 找不到錯誤
CREATE TABLE CUSTACC(
REFNO CHAR(4),
ACCNO NUMBER(7),
CONSTRAINT CUSTACC_PK PRIMARY KEY (REFNO, ACCNO));
CREATE TABLE CUST(
CUSTNO CHAR(4),
NAME VARCHAR2(30),
ADDRESS VARCHAR2(50),
AREA VARCHAR2(10),
CONSTRAINT CUSTNO_PK PRIMARY KEY(CUSTNO),
CONSTRAINT CUSTNO_FK FOREIGN KEY (CUSTNO)
REFERENCES CUSTACC(REFNO));
CREATE TABLE ACC(
ACCNO NUMBER(7),
BALANCE NUMBER(8,2),
BRANCH VARCHAR2(10),
OPENED DATE,
BONUS NUMBER(8,2),
CONSTRAINT ACCNO_PK PRIMARY KEY (ACCNO),
CONSTRAINT ACCNO_FK FOREIGN KEY (ACCNO)
REFERENCES CUSTACC(ACCNO));
我必須是盲人,但我已經檢查過以前所有人都提出過的建議。