ERROR 1062（23000）：为'PRIMARY'键重复输入'@ localhost.localdomain'

Question

我错误地输入了这个mysql命令：

INSERT INTO `alias` (`source`, `destination`) VALUES ("@localhost.localdomain", "@localhost"), ("@localhost", "email1@domain1.com");

我想从mysql数据库中删除或更新电子邮件地址email1@domain1.com，因为当我尝试插入时：

INSERT INTO `alias` (`source`, `destination`) VALUES ("@localhost.localdomain", "@localhost"), ("@localhost", "goodaccount@domain.com");

我收到了错误：

ERROR 1062 (23000): Duplicate entry '@localhost.localdomain' for key 'PRIMARY'

Answer 1

字段source是alias表中的主键。并且您不能一次又一次地在PK字段中插入相同的值。当您在PK字段中再次插入相同的值时，您收到此错误

您可以像这样更新电子邮件

UPDATE alias SET destination = 'goodaccount@domain.com' WHERE source  = "@localhost";

删除

DELETE FROM alias WHERE destination = 'email1@domain1.com' AND source  = "@localhost";

Answer 2

插入时出错。你插入两个!!行，但你只需要一个。

INSERT INTO `alias` (`source`, `destination`) VALUES  ("@localhost", "goodaccount@domain.com");
DELETE FROM `alias` WHERE `destination` = 'email1@domain1.com' and `source` = '@localhost.localdomain';