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我有两个表，“booking”和“isBooked”。我想向 isBooked 表添加值。但我不断收到错误消息“无法添加或更新子外键约束失败”。
CREATE TABLE booking (
bookingID INT AUTO_INCREMENT,
customerID INT,
startDate DATE,
endDate DATE,
dateBookedOn TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
employeeID int,
PRIMARY KEY (bookingID),
INDEX idx_start (startDate),
INDEX idx_end (endDate),
FOREIGN KEY (customerID) REFERENCES customer(CustomerID)
);
CREATE TABLE isBooked(
BookingID int,
DogID int,
RunID int,
foreign key (RunID) references Run(RunID),
foreign key (DogID) references Dog(dogID),
foreign key (BookingID) references Booking(BookingID)
);
insert into isbooked values(1, 1, 1);
谁能告诉我为什么在尝试向“isBooked”插入值时出现此错误。