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inserting error [message #78809] Mon, 18 March 2002 09:25 Go to next message
Angela
Messages: 13
Registered: October 2000
Junior Member
I've already successful to insert data into table book and magazine (as below). But, why I cannot insert data into table reader? The error message is:
ORA-02291: integrity constraint (SCOTT.READER_2) violated - parent key not found

CREATE TABLE BOOK
(Book_Name VARCHAR(30) NOT NULL,
Edition_No VARCHAR(3) NOT NULL,
CONSTRAINT Book_PK PRIMARY KEY (Book_Name, Edition_No),
CONSTRAINT Book_U UNIQUE (Book_Name));

CREATE TABLE MAGAZINE
(Magazine_Name VARCHAR(30) NOT NULL,
Edition_No VARCHAR(3) NOT NULL,
Number_of_reporters NUMBER(4),
CONSTRAINT Magazine_PK PRIMARY KEY (Magazine_Name, Edition_No),
CONSTRAINT Magazine_U UNIQUE (Magazine_Name));

CREATE TABLE READER
(Reader_ID VARCHAR(10) NOT NULL,
Reader_name VARCHAR(30) NOT NULL,
Information_Name VARCHAR(20) NOT NULL,
Edition_No VARCHAR(4) NOT NULL,
CONSTRAINT Reader_PK PRIMARY KEY (Reader_ID),
CONSTRAINT Reader_U UNIQUE (Information_Name),
CONSTRAINT Reader_1 FOREIGN KEY (Information_Name) REFERENCES Book (Book_Name),
CONSTRAINT Reader_2 FOREIGN KEY (Information_Name) REFERENCES Magazine (Magazine_Name));
Re: inserting error [message #78818 is a reply to message #78809] Mon, 18 March 2002 23:56 Go to previous messageGo to next message
pratap kumar tripathy
Messages: 660
Registered: January 2002
Senior Member
in the reader table there is two foreign key on sam field "information_name", it seems little bit strange.

please review ur design.

according to current design , u can insert information_name if it exist in both book and makagize table.try inserting same book_name and magazine_name and the insert into reader table

ORA-02291 integrity constraint str.name violated - parent key not found
----------------------------------------------
Cause: An attempt was made to INSERT or UPDATE a foreign key value. The result was a value that is not in the parent key.

Action: UPDATE to or INSERT a value that is in the parent key.
Re: inserting error [message #78936 is a reply to message #78809] Thu, 04 April 2002 00:22 Go to previous message
Ayan
Messages: 11
Registered: February 2002
Junior Member
SCOTT>insert into book values('book1', '1')
SCOTT>/

1 row created.

SCOTT>insert into magazine values('book1', '1', 4)
SCOTT>/

1 row created.

SCOTT>insert into reader values ('1', '1', 'book1', '1')
SCOTT>/

1 row created.

SCOTT>commit;

Commit complete.

Everything is fine. Check the data that you are entering. Hope this will help you.

Ayan
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