I'm trying to popular the following database:
DROP DATABASE IF EXISTS library;
CREATE DATABASE library;
USE library;
CREATE TABLE AUTHOR (
NAME VARCHAR(50) NOT NULL,
COUNTRY VARCHAR(50) NOT NULL,
TITLE VARCHAR(50) NOT NULL,
PRIMARY KEY (NAME,TITLE)
) ENGINE = INNODB;
CREATE TABLE BOOK (
TITLE VARCHAR(50) NOT NULL,
ISBN CHAR(10) NOT NULL,
PUBLISHER VARCHAR(50) NOT NULL,
SUBJECT VARCHAR(50) NOT NULL,
PRIMARY KEY (ISBN)
) ENGINE = INNODB;
CREATE TABLE WRITES (
NAME VARCHAR(50) NOT NULL,
TITLE VARCHAR(50) NOT NULL,
ISBN CHAR(10) NOT NULL,
PRIMARY KEY (NAME,ISBN)
) ENGINE = INNODB;
ALTER TABLE WRITES ADD CONSTRAINT FK_BOOK_WRITES
FOREIGN KEY(ISBN) REFERENCES BOOK(ISBN)
ON DELETE RESTRICT ON UPDATE RESTRICT;
ALTER TABLE WRITES ADD CONSTRAINT FK_AUTHOR_WRITES
FOREIGN KEY(NAME) REFERENCES AUTHOR(NAME)
ON DELETE RESTRICT ON UPDATE RESTRICT;
INSERT INTO AUTHOR (NAME,COUNTRY,TITLE) VALUES("Dorothy King","England","Springtime Gardening");
INSERT INTO AUTHOR (NAME,COUNTRY,TITLE) VALUES("Jon Nkoma","Kenya","Birds of Africa");
INSERT INTO AUTHOR (NAME,COUNTRY,TITLE) VALUES("Won Lau","China","Early Tangs Paintings");
INSERT INTO AUTHOR (NAME,COUNTRY,TITLE) VALUES("Bert Kovalsco","United States","Baskets for Today");
INSERT INTO AUTHOR (NAME,COUNTRY,TITLE) VALUES("Tom Quercos","Mexico","Mayan Art");
INSERT INTO AUTHOR (NAME,COUNTRY,TITLE) VALUES("Jimmy Chan","China","Early Tangs Paintings");
INSERT INTO AUTHOR (NAME,COUNTRY,TITLE) VALUES("Dorothy King","England","Autumn Annuals");
INSERT INTO AUTHOR (NAME,COUNTRY,TITLE) VALUES("Jane East","United States","Springtime Gardening");
INSERT INTO BOOK (TITLE,ISBN,PUBLISHER,SUBJECT) VALUES("Springtime Gardening","0816354219","Harding","Nature");
INSERT INTO BOOK (TITLE,ISBN,PUBLISHER,SUBJECT) VALUES("Early Tangs Paintings","036487547X","Ballman","Art");
INSERT INTO BOOK (TITLE,ISBN,PUBLISHER,SUBJECT) VALUES("Birds of Africa","0115012141","Loraine","Nature");
INSERT INTO BOOK (TITLE,ISBN,PUBLISHER,SUBJECT) VALUES("Springtime Gardening","0560001428","Swift-Key","Nature");
INSERT INTO BOOK (TITLE,ISBN,PUBLISHER,SUBJECT) VALUES("Baskets for Today","0816537054","Harding","Art");
INSERT INTO BOOK (TITLE,ISBN,PUBLISHER,SUBJECT) VALUES("Autumn Annuals","0816885060","Harding","Nature");
INSERT INTO WRITES (NAME,TITLE,ISBN) VALUES("Jimmy Chan","Early Tangs Paintings","036487547X");
INSERT INTO WRITES (NAME,TITLE,ISBN) VALUES("Dorothy King","Autumn Annuals","0816885060");
INSERT INTO WRITES (NAME,TITLE,ISBN) VALUES("Jane East","Springtime Gardening",0560001428);
INSERT INTO WRITES (NAME,TITLE,ISBN) VALUES("Bert Kovalsco","Baskets for Today","0816537054");
INSERT INTO WRITES (NAME,TITLE,ISBN) VALUES("Won Lau","Early Tangs Paintings","036487547X");
INSERT INTO WRITES (NAME,TITLE,ISBN) VALUES("Jon Nkoma","Birds of Africa","0115012141");
INSERT INTO WRITES (NAME,TITLE,ISBN) VALUES("Dorothy King","Springtime Gardening","0816354219");
But I get the following error:
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails ('library'.'WRITES', CONSTRAINT 'FK_BOOK_WRITES' FOREIGN KEY ('ISBN') REFERENCES 'BOOK' ('ISBN'))
There's already a similar question a>, but it did not help me much.