check是保留字。不要使用没有双引号的它。例如，如果我们将其更改为check_col，则它可以正常工作：

create table BookChe (
check_col number(10) not null,
bookISBN number(13) not null,
bookCopy number(10) not null,
constraint pk_ResChe primary key (check, bookISBN, bookCopy),
constraint fk_ResChe_Che foreign key (check) references checkout,
constraint fk_ResChe_book foreign key (bookISBN, bookCopy) references book
);

和带双引号的示例：

create table BookChe (
"CHECK" number(10) not null,
bookISBN number(13) not null,
bookCopy number(10) not null,
constraint pk_ResChe primary key ("CHECK", bookISBN, bookCopy),
constraint fk_ResChe_Che foreign key ("CHECK") references checkout,
constraint fk_ResChe_book foreign key (bookISBN, bookCopy) references book
);