Sql ORA-02291:违反完整性约束(OPS$P2417335.VOD_FILM_CLASS_FK)-未找到父密钥
我在向vod_film表中插入值时遇到问题。各表如下:Sql ORA-02291:违反完整性约束(OPS$P2417335.VOD_FILM_CLASS_FK)-未找到父密钥,sql,oracle,foreign-keys,relational-database,Sql,Oracle,Foreign Keys,Relational Database,我在向vod_film表中插入值时遇到问题。各表如下: CREATE TABLE vod_classification ( dbClassId CHAR(3) NOT NULL, dbDescription VARCHAR2(150), CONSTRAINT vod_classification_PK PRIMARY KEY (dbClassId) ); CREATE TABLE vod_film ( dbFilmId NUMBER(4) NOT NU
CREATE TABLE vod_classification (
dbClassId CHAR(3) NOT NULL,
dbDescription VARCHAR2(150),
CONSTRAINT vod_classification_PK PRIMARY KEY (dbClassId)
);
CREATE TABLE vod_film (
dbFilmId NUMBER(4) NOT NULL,
dbTitle VARCHAR2(100) NOT NULL,
dbDirector_firstname VARCHAR2(50) NOT NULL,
dbDirector_lastname VARCHAR2(50) NOT NULL,
dbGenre VARCHAR2(20),
dbUK_release_date DATE,
dbFilename VARCHAR2(50),
dbRuntime NUMBER(4),
dbClass CHAR(3),
CONSTRAINT vod_film_PK PRIMARY KEY (dbFilmId),
CONSTRAINT vod_film_class_FK FOREIGN KEY (dbClass) REFERENCES vod_classification (dbClassId)
ON DELETE SET NULL
);
CREATE TABLE vod_actor (
dbActorId CHAR(4) NOT NULL,
dbFirstname VARCHAR2(50) NOT NULL,
dbLastname VARCHAR2(50) NOT NULL,
dbDateOfBirth DATE,
dbNationality VARCHAR2(30),
dbBiography CLOB,
CONSTRAINT vod_actor_PK PRIMARY KEY (dbActorId)
);
CREATE TABLE vod_role (
dbFilmId NUMBER(4) NOT NULL,
dbActorId CHAR(4) NOT NULL,
dbCharacterName VARCHAR2(25) NOT NULL,
dbFirstAppearance NUMBER(6),
dbDescription CLOB,
CONSTRAINT vod_role_PK PRIMARY KEY (dbFilmId, dbActorId, dbCharacterName),
CONSTRAINT vod_role_film_FK FOREIGN KEY (dbFilmId) REFERENCES vod_film (dbFilmId)
ON DELETE CASCADE,
CONSTRAINT vod_role_actor_FK FOREIGN KEY (dbActorId) REFERENCES vod_actor (dbActorId)
ON DELETE CASCADE
);
INSERT INTO vod_film (dbFilmId, dbTitle, dbDirector_firstname, dbDirector_lastname, dbGenre, dbUK_release_date, dbFilename, dbRuntime, dbClass)
VALUES (1, 'Toy Story 3', 'lee', 'unkrich', 'Comedy', '19-JUL-2010', 'ToyStory3.mpg', 103, 'U');
当我运行以下命令时:
CREATE TABLE vod_classification (
dbClassId CHAR(3) NOT NULL,
dbDescription VARCHAR2(150),
CONSTRAINT vod_classification_PK PRIMARY KEY (dbClassId)
);
CREATE TABLE vod_film (
dbFilmId NUMBER(4) NOT NULL,
dbTitle VARCHAR2(100) NOT NULL,
dbDirector_firstname VARCHAR2(50) NOT NULL,
dbDirector_lastname VARCHAR2(50) NOT NULL,
dbGenre VARCHAR2(20),
dbUK_release_date DATE,
dbFilename VARCHAR2(50),
dbRuntime NUMBER(4),
dbClass CHAR(3),
CONSTRAINT vod_film_PK PRIMARY KEY (dbFilmId),
CONSTRAINT vod_film_class_FK FOREIGN KEY (dbClass) REFERENCES vod_classification (dbClassId)
ON DELETE SET NULL
);
CREATE TABLE vod_actor (
dbActorId CHAR(4) NOT NULL,
dbFirstname VARCHAR2(50) NOT NULL,
dbLastname VARCHAR2(50) NOT NULL,
dbDateOfBirth DATE,
dbNationality VARCHAR2(30),
dbBiography CLOB,
CONSTRAINT vod_actor_PK PRIMARY KEY (dbActorId)
);
CREATE TABLE vod_role (
dbFilmId NUMBER(4) NOT NULL,
dbActorId CHAR(4) NOT NULL,
dbCharacterName VARCHAR2(25) NOT NULL,
dbFirstAppearance NUMBER(6),
dbDescription CLOB,
CONSTRAINT vod_role_PK PRIMARY KEY (dbFilmId, dbActorId, dbCharacterName),
CONSTRAINT vod_role_film_FK FOREIGN KEY (dbFilmId) REFERENCES vod_film (dbFilmId)
ON DELETE CASCADE,
CONSTRAINT vod_role_actor_FK FOREIGN KEY (dbActorId) REFERENCES vod_actor (dbActorId)
ON DELETE CASCADE
);
INSERT INTO vod_film (dbFilmId, dbTitle, dbDirector_firstname, dbDirector_lastname, dbGenre, dbUK_release_date, dbFilename, dbRuntime, dbClass)
VALUES (1, 'Toy Story 3', 'lee', 'unkrich', 'Comedy', '19-JUL-2010', 'ToyStory3.mpg', 103, 'U');
我有以下错误返回:
ORA-02291:违反完整性约束(OPS$P2417335.VOD_FILM_CLASS_FK)-未找到父密钥
我不确定为什么会返回此错误,因为外键引用了vod_分类中的现有字段。在插入数据时,所有表格都已按我认为正确的顺序添加
任何关于我为什么会收到这个错误的帮助都将不胜感激,或者如果我需要提供任何进一步的信息,请告诉我
问候,
史蒂文。我认为信息非常清楚。约束条件是:
CONSTRAINT vod_film_class_FK FOREIGN KEY (dbClass)
REFERENCES vod_classification (dbClassId)
ON DELETE SET NULL
错误表示您正在添加值dbClass
(即“U
”)。此值不在vod\u分类.dbClassId
中
您可以检查该值是否存在:
select c.*
from vod_classification c
where c.dbClassId = 'U';
很可能没有ID为
'U'
的类。查看执行SELECT*FROM vod_classification时得到的结果,其中classid='U'代码>。应该是一个空集。@stickybit我现在理解了错误,我对SQL非常陌生。我没有在分类表中添加任何数据。一旦我添加了元组,它就工作得非常好。谢谢你的帮助:)谢谢你,你所指出的解决了我的问题。我没有在分类表中添加任何元组。