所以我有,表课程:
CREATE TABLE IF NOT EXISTS `AppDziennik`.`courses` (
`id_course` INT NOT NULL AUTO_INCREMENT ,
`name` VARCHAR(80) NOT NULL ,
`teachers_id_teacher` INT NOT NULL ,
`end_date` DATE NULL ,
`about` VARCHAR(255) NULL ,
`start_date` DATE NULL ,
PRIMARY KEY (`id_course`) ,
UNIQUE INDEX `id_course_UNIQUE` (`id_course` ASC) ,
CONSTRAINT `fk_courses_teachers1`
FOREIGN KEY (`teachers_id_teacher` )
REFERENCES `AppDziennik`.`teachers` (`id_teacher` )
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB
和第二个表
CREATE TABLE IF NOT EXISTS `AppDziennik`.`teachers` (
`id_teacher` INT NOT NULL AUTO_INCREMENT ,
`name` VARCHAR(45) NOT NULL ,
`surname` VARCHAR(45) NOT NULL ,
`about` VARCHAR(255) NULL ,
`id_class` INT NULL ,
`rank` VARCHAR(45) NULL ,
`logins_id_login` INT NOT NULL ,
PRIMARY KEY (`id_teacher`) ,
INDEX `fk_teachers_classes1_idx` (`id_class` ASC) ,
INDEX `fk_teachers_logins1_idx` (`logins_id_login` ASC) ,
CONSTRAINT `fk_teachers_classes1`
FOREIGN KEY (`id_class` )
REFERENCES `AppDziennik`.`classes` (`id_class` )
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `fk_teachers_logins1`
FOREIGN KEY (`logins_id_login` )
REFERENCES `AppDziennik`.`logins` (`id_login` )
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB
当我插入
时插入appdziennik.courses (name,id_teacher,about,start_date,end_date) 价值观(“数学”,“7”,“数学”,“2013-08-01”,“2014-06-29”);
我收到了这个错误:
错误代码:1364。字段'teachers_id_teacher'没有默认值 值
我犯了错误?我怎么能解决它。
答案 0 :(得分:2)
如果您要向表INSERT
发送courses
,则表示没有字段id_teacher
(您希望teachers_id_teacher
)。由于您使用的是外键,因此在您teachers
表INSERT
中的记录courses
之前,表{{1}} 中存在 键 。此外,您应该只在所有语句中使用反引号(`)和单引号(')。
答案 1 :(得分:1)
您正在尝试在列id_teacher列的课程表中插入一个值,但是您没有为列teachers_id_teacher插入值。所以我建议如下声明:
insert into appdziennik.courses (name, teachers_id_teacher, about, start_date, end_date) values ("Math",'7',"Math",'2013-08-01','2014-06-29');
Sarajog