【发布时间】：2018-05-19 19:43:35
【问题描述】：
一名护士通过对三种不同用品之一的申请订购医疗用品，所有用品均由供应商提供。
护士>申请
由于项目可以是三种类型之一，并且可能尚不存在项目的申请，因此申请表具有 3 种供应类型的外键。
问题：我正确列出的外键都指向 3 个不同的表，除了其中一个之外，每个表都没有对应的外键。
我收到以下错误：
第 1 行出现错误：ORA-02091：事务回滚
ORA-02291: 违反完整性约束 (MMM1339.ITEMNO_PHAR_FK) - 未找到父键
CREATE TABLE SUPPLIER
(SUPPLIERNO INT,
SUPPLIERNAME VARCHAR2(100),
PHONENO VARCHAR2(12),
ADDRESS VARCHAR(100),
FAXNO VARCHAR(12),
CONSTRAINT SUPPLIERNO_SSPL_PK PRIMARY KEY(SUPPLIERNO));
CREATE TABLE SUPPLIES_PHARMACEUTICAL
(ITEMNO INT,
SUPPLIERNO INT,
NAME VARCHAR2(25),
DESCRIPTION VARCHAR2(25),
QUANTITYINSTOCK INT,
REORDERLEVEL INT,
COSTPERUNIT DECIMAL(6,2),
DOSAGE VARCHAR2(12),
CONSTRAINT ITEMNO_PHAR_PK PRIMARY KEY(ITEMNO));
CREATE TABLE SUPPLIES_SURGICAL
(ITEMNO INT,
NAME VARCHAR2(25),
DESCRIPTION VARCHAR2(25),
QUANTITYINSTOCK INT,
REORDERLEVEL INT,
COSTPERUNIT DECIMAL(6,2),
SUPPLIERNO INT,
CONSTRAINT ITEMNO_SUP_PK PRIMARY KEY(ITEMNO));
CREATE TABLE SUPPLIES_NONSURGICAL
(ITEMNO INT,
NAME VARCHAR2(25),
DESCRIPTION VARCHAR2(25),
QUANTITYINSTOCK INT,
REORDERLEVEL INT,
COSTPERUNIT DECIMAL(6,2),
SUPPLIERNO INT,
CONSTRAINT ITEMNO_NONSURG_PK PRIMARY KEY(ITEMNO));
CREATE TABLE STAFF_CHARGENURSE
(STAFFNO INT,
ADDRESS VARCHAR2(25),
POSITION VARCHAR2(12),
BUDGET DECIMAL(6,2),
SPECIALTY VARCHAR2(12),
CONSTRAINT STAFFNO_CHNURSE_PK PRIMARY KEY(STAFFNO));
CREATE TABLE REQUISITION
(REQNO INT,
STAFFNO INT,
STAFFNAME VARCHAR2(25),
WARDNO INT,
ITEMNO INT,
QUANTITY INT,
DATEORDERED DATE,
DATERECIEVED DATE,
CONSTRAINT REQ_PK PRIMARY KEY(REQNO));
外键：
ALTER TABLE SUPPLIES_PHARMACEUTICAL
ADD CONSTRAINT SUPPLIERNO_PHA_FK FOREIGN KEY(SUPPLIERNO) REFERENCES SUPPLIER(SUPPLIERNO)
DEFERRABLE INITIALLY DEFERRED;
ALTER TABLE SUPPLIES_SURGICAL
ADD CONSTRAINT SUPPLIERNO_SURG_FK FOREIGN KEY(SUPPLIERNO) REFERENCES SUPPLIER(SUPPLIERNO)
DEFERRABLE INITIALLY DEFERRED;
ALTER TABLE SUPPLIES_NONSURGICAL
ADD CONSTRAINT SUPPLIERNO_NONSURG_FK FOREIGN KEY(SUPPLIERNO) REFERENCES SUPPLIER(SUPPLIERNO)
DEFERRABLE INITIALLY DEFERRED;
ALTER TABLE REQUISITION
ADD CONSTRAINT STAFFNO_REQ_FK FOREIGN KEY(STAFFNO) REFERENCES STAFF_CHARGENURSE(STAFFNO)
DEFERRABLE INITIALLY DEFERRED;
ALTER TABLE REQUISITION
ADD CONSTRAINT ITEMNO_PHAR_FK FOREIGN KEY(ITEMNO) REFERENCES SUPPLIES_PHARMACEUTICAL(ITEMNO)
DEFERRABLE INITIALLY DEFERRED;
ALTER TABLE REQUISITION
ADD CONSTRAINT ITEMNO_SURG_FK FOREIGN KEY(ITEMNO) REFERENCES SUPPLIES_SURGICAL(ITEMNO)
DEFERRABLE INITIALLY DEFERRED;
ALTER TABLE REQUISITION
ADD CONSTRAINT ITEMNO_NONSURG_FK FOREIGN KEY(ITEMNO) REFERENCES SUPPLIES_NONSURGICAL(ITEMNO)
DEFERRABLE INITIALLY DEFERRED;
测试数据：
INSERT INTO REQUISITION VALUES(1, 20, 'Julie Wood', 8, 888520, 2, '27-FEB-2018', '15-MAR-2018');
INSERT INTO REQUISITION VALUES(2, 20, 'Julie Wood', 8, 923956, 1, '25-FEB-2018', '28-FEB-2018');
INSERT INTO REQUISITION VALUES(3, 21, 'Sarah Michaels', 7, 054802, 3, '20-FEB-2018', '22-FEB-2018');
INSERT INTO SUPPLIES_PHARMACEUTICAL VALUES (823456, 100001, 'Zanax', 'Anti Depressant', 8, 2, 100.50, '50mg');
INSERT INTO SUPPLIES_PHARMACEUTICAL VALUES (923956, 100001, 'Zupridol', 'Blood Pressure Treatment', 12, 5, 50, '20mg');
INSERT INTO SUPPLIES_PHARMACEUTICAL VALUES (3952, 200001, 'Amibreezax', 'Artificial Ear Wax', 2, 1, 200, '5g');
INSERT INTO SUPPLIES_PHARMACEUTICAL VALUES (4955, 200001, 'Ambridax', 'Skin Treatment', 5, 10, 20, '2mg');
INSERT INTO SUPPLIES_SURGICAL VALUES (54802, 'Scalpel', 'Surgical Tool', 20, 10, 200.42, 100001);
INSERT INTO SUPPLIES_SURGICAL VALUES (634520, 'Stitches', 'Suture Tool', 100, 10, 2.50, 200001);
INSERT INTO SUPPLIES_NONSURGICAL VALUES (888520, 'Cart', '5ftx2ftx3ft', 2, 0, 200.00, 100001);
INSERT INTO SUPPLIES_NONSURGICAL VALUES (423, 'Tool Holder', 'Holds Inspection Equip.', 4, 2, 50.00, 100001);
INSERT INTO STAFF_CHARGENURSE VALUES(20, '32 Stark St. Portland, OR', 'Charge Nurse', 8000.99, 'Head Trauma');
INSERT INTO STAFF_CHARGENURSE VALUES(21, '18 Wilson Rd Portland, OR', 'Charge Nurse', 6000, 'Epidermus');
INSERT INTO SUPPLIER VALUES (100001,'Company A', '503-222-3333', '100 SE Stark Rd Portland, OR', '503-666-4444');
INSERT INTO SUPPLIER VALUES (200001,'Company B', '666-333-4444', '500 SE Bilerica Rd Akron, OH', '666-444-3333');
COMMIT;
【问题讨论】：
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如果这是您尝试运行的脚本，唯一的问题是您的插入顺序是错误的，首先您是 suplies_whatever，然后是供应商，然后是员工，最后是您的申请表，即链接表全部。要获得链接，链接的项目必须首先存在。
-
已重新排序，但仍然存在同样的问题。