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ALTER TABLE items
ADD CONSTRAINT member_1
FOREIGN KEY(Member_ID)
REFERENCES users(UserID)
ON UPDATE CASCADE
ON DELETE CASCADE;
MySQL表示:我不能讓表在MySQL
1452 - 不能添加或更新子行,外鍵約束失敗(`shop`.`#SQL-1650_234`,約束`member_1` FOREIGN KEY (`Member_ID`)參考`users`(`UserID`)ON DELETE CASCADE ON UPDATE CASCADE)