Усеченное двойное значение и не может обновить дочернюю строку

Question

Я создал базу данных «a3» и таблицы, как указано ниже. Однако, я получаю эти ошибки при вставке.

Код 1 Ошибка: 1292. Усеченный неправильно DOUBLE значение: «Нил Армстронг и Базз Олдрин ходил, сколько»

and following line 'insert into answerOption values (3,2,'A','123');' 

Код 2-Error: 1452. Невозможно добавить или обновить дочернюю строку: иностранный ключа не выполняется (a3. answeroption, скованность answeroption_ibfk_1 FOREIGN KEY (eno, qno) Лит question (eno, qno))

create table exam (
    eno numeric(5), 
    etitle varchar(50), 
    timeAllowed numeric(8), 
    numberOfQuestionsPerPage numeric(3), 
    primary key (eno) 
); 

create table question (
    eno numeric(5), 
    qno numeric(5), 
    qtext nvarchar(2048), 
    correctAnswer char(1), 
    foreign key (eno) references exam(eno), 
    primary key (eno,qno) 
); 

create table answerOption (
    eno numeric(5), 
    qno numeric(5), 
    ono char(1) check (ono in ('A','B','C','D','E')), 
    optionText nvarchar(256), 
    foreign key (eno,qno) references question (eno,qno), 
    primary key (eno,qno,ono) 
); 

insert into exam values (3,'Elementary History',10,3); 

insert into question values(3,1,'The Battle of Gettysburg was fought during which war?','C'); 
insert into answerOption values (3,1,'A','World War II'); 
insert into answerOption values (3,1,'B','The Revolutionary War'); 
insert into answerOption values (3,1,'C','The Civil War'); 
insert into answerOption values (3,1,'D','World War I'); 

insert into question values (3,2,'Neil Armstrong and Buzz Aldrin walked how many \n' ||'minutes on the moon in 1696?','B') ; 
insert into answerOption values (3,2,'A','123'); 
insert into answerOption values (3,2,'B','None'); 
insert into answerOption values (3,2,'C','10'); 
insert into answerOption values (3,2,'D','51'); 

insert into question values (3,3,'Which Presidents held office during World War II?','D'); 
insert into answerOption values (3,3,'A','Franklin D. Roosevelt'); 
insert into answerOption values (3,3,'B','Dwight D. Eisenhower'); 
insert into answerOption values (3,3,'C','Harry Truman'); 
insert into answerOption values (3,3,'D','Both A and C'); 

insert into question values (3,4,'In a communist economic system, people:','B'); 
insert into answerOption values (3,4,'A','Are forced to work as slaves'); 
insert into answerOption values (3,4,'B','Work for the common good'); 
insert into answerOption values (3,4,'C','Work from home computers'); 
insert into answerOption values (3,4,'D','Don''t work'); 


insert into question values (3,5,'Which president did not die while in office?','D'); 
insert into answerOption values (3,5,'A','John F. Kennedy'); 
insert into answerOption values (3,5,'B','Franklin D. Roosevelt'); 
insert into answerOption values (3,5,'C','Abraham Lincoln'); 
insert into answerOption values (3,5,'D','Ronald Reagan'); 
insert into answerOption values (3,5,'E','James A. Garfield'); 

insert into question values (3,6,'Which state refused to attend the Constitutional Convention \n' || 
     'in 1787 because it didn''t want the United States government \n' || 
     'to interfere with already established state affairs?','A'); 
insert into answerOption values (3,6,'A','Rhode Island'); 
insert into answerOption values (3,6,'B','New Hampshire'); 
insert into answerOption values (3,6,'C','New Jersey'); 
insert into answerOption values (3,6,'D','New York'); 

insert into question values (3,7,'Who founded Buddhism?','A'); 
insert into answerOption values (3,7,'A','Siddharta Gautama'); 
insert into answerOption values (3,7,'B','Jesus Christ'); 
insert into answerOption values (3,7,'C','Mahatma Gandhi'); 
insert into answerOption values (3,7,'D','Muhammad'); 

insert into question values (3,8,'Where is India?','D'); 
insert into answerOption values (3,8,'A','Australia'); 
insert into answerOption values (3,8,'B','America'); 
insert into answerOption values (3,8,'C','Africa'); 
insert into answerOption values (3,8,'D','Asia'); 


insert into question values (3,9,'What is the dominant religion in India?','B'); 
insert into answerOption values (3,9,'A','Islam'); 
insert into answerOption values (3,9,'B','Hinduism'); 
insert into answerOption values (3,9,'C','Christianity'); 
insert into answerOption values (3,9,'D','Buddhism'); 

insert into question values (3,10,'Near which river did archaeologists find India''s \n' || 
     'first civilization?','B'); 
insert into answerOption values (3,10,'A','The Tiber River'); 
insert into answerOption values (3,10,'B','The Indus River'); 
insert into answerOption values (3,10,'C','The Yellow River'); 
insert into answerOption values (3,10,'D','The Nile River'); 

Answer 1

Я думаю, что проблема лежит здесь:

insert into question values (3,2,'Neil Armstrong and Buzz Aldrin walked how many \n' || 'minutes on the moon in 1696?','B') ; 

Что это ||? Вы пытаетесь объединить строки? Это синтаксис ORACLE, и вы отметили MySQL. Я не понимаю, почему вам необходимо выполнить concat, кажется, что это может быть построено как 1 строка.

В любом случае, если вы хотите Concat в MySQL, используйте CONCAT():

insert into question values (3,2,concat('Neil Armstrong and Buzz Aldrin walked how many \n','minutes on the moon in 1696?'),'B') ; 

Вам нужно будет исправить, что во всех вставок, что имеет ||