Mysql 删除用户并授予多个主机 [英] Mysql drop user with grants for multiple hosts

问题描述

我向我的 mysql-db 添加了一个用户，并授予从多个主机访问的权限，例如:

I added a user to my mysql-db with grants to access from several hosts, like:

GRANT ALL PRIVILEGES ON `db`.* TO 'dbuser'@'host1';
GRANT ALL PRIVILEGES ON `db`.* TO 'dbuser'@'host2';
GRANT ALL PRIVILEGES ON `db`.* TO 'dbuser'@'host3';
GRANT ALL PRIVILEGES ON `db`.* TO 'dbuser'@'host4';
....

完全删除用户的最短方法是什么?我试过了:

What is the shortest way to remove the user completly? I tried:

drop user 'dbuser'@'%';
ERROR 1396 (HY000): Operation DROP USER failed for 'dbuser'@'%'

drop user 'dbuser';
ERROR 1396 (HY000): Operation DROP USER failed for 'dbuser'@'%'

show grants for 'dbuser';
ERROR 1141 (42000): There is no such grant defined for user 'dbuser' on host '%'

我想，% 将被视为通配符.Butr似乎是为每个主机删除用户的唯一方法，例如:

I thought, % wouzld be treated as a wildcard. Butr the only way seems to drop the user for every host, like:

drop user 'dbuser'@'host1';
drop user 'dbuser'@'host2';
drop user 'dbuser'@'host3';
...

难道没有更方便的方法来删除用户吗?

Isn't there a more convenient way to remove the user?

推荐答案

MySQL <= 5.6.x

MySQL <= 5.6.x

select user,host,password from mysql.user;

MySQL >=5.7.x

MySQL >=5.7.x

select user,host,authentication_string from mysql.user;

以上您将需要创建一个回滚计划，相信我，如果删除大量用户并且您想节省时间，您总是需要一个回滚计划.

The above you will need to create a rollback plan and believe me you will always need one if deleting a lot of users and you want to save time.

现在回答您的问题:

select concat("DROP USER ","'",user,"'@'",host,"';") from mysql.user where host like "127.0.%" or host like "192.168%";

根据您的平台，探索如何将输出粘贴到文件中并执行

Depending on your platform , explore how to stick the output into a file and execute it

这篇关于Mysql 删除用户并授予多个主机的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！