錯誤上傳數據庫到mysql

Question

-- Constraints for table `variation` 
-- 
ALTER TABLE `variation` 
    ADD FOREIGN KEY (`parent`) REFERENCES `variation` (`id`), 
    ADD FOREIGN KEY (`scale`) REFERENCES `scale` (`id`), 
    ADD FOREIGN KEY (`user`) REFERENCES `users` (`user_id`); 

-- 

錯誤

ERROR 1452（23000）於行277：不能添加或更新子行：一個 外鍵約束失敗（getsy#sql-f44_2a，約束 #sql-f44_2a_ibfk_2 FOREIGN KEY（scale）參考scale（id））

該表格變化

CREATE TABLE IF NOT EXISTS `variation` (
    `id` bigint(20) NOT NULL AUTO_INCREMENT, 
    `parent` bigint(20) DEFAULT NULL, 
    `scale` bigint(20) DEFAULT NULL, 
    `value` varchar(255) NOT NULL, 
    `user` bigint(20) DEFAULT NULL, 
    PRIMARY KEY (`id`), 
    UNIQUE KEY `parent` (`parent`,`scale`,`value`,`user`), 
    KEY `scale` (`scale`), 
    KEY `user` (`user`) 
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=101 ; 

幫助我..

感謝

Answer 1

貌似在variation表列scale包含缺少表scale列id值。

您可以檢查缺失值與下面的查詢：

SELECT DISTINCT a.scale FROM 
    variation AS a LEFT JOIN scale AS b ON a.scale = b.id 
WHERE b.id IS NULL;