CONSTRAINT salary_eid_fk FOREIGN KEY(eid) REFERENCES empinfo(eid) ); CREATE TABLE salary( eid NUMBER(3) PRIMARY KEY REFERENCES empinfo(eid), ... ); --定义测试表,在其内部字段间定义参照完整性约束 CREATE TABLE myemp( empno NUMBER(4) PRIMARY KEY, ename VARCHAR2(20), job VARCHAR2(9), ...