mysql Access denied for user 错误处理

最新推荐文章于 2025-03-10 14:56:35 发布

dm520

最新推荐文章于 2025-03-10 14:56:35 发布

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分类专栏：技术文章标签： user access mysql null 数据库 delete

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MySQL中出现连接错误:

ERROR 1045 (28000): Access denied for user

----------------------------------------------------------------------------------

1.添加用户

shell>mysql

mysql>use mysql

mysql>grant all privileges on *.* to 'test' identified by 'test' with grant option;

mysql>flush privileges;

[也可以使用下面两种方式建立用户]

------------------------

$1直接操作mysql.user这张表;

$2使用DDL语言,
定义用户:create user test identified by 'test';

删除用户:drop user test

------------------------

2.使用test登录(总是无法连接)

shell>mysql -u test -p

ERROR 1045 (28000): Access denied for user 'test'@'localhost' (using password: YES)

3.查看user表,我们会发现user表中的user字段有NULL

4.删除user.user中值为NULL的,或更新NULL为test

4.1)delete from user where user is NULL

4.2)update user set user='test' where user is NULL

5.参看用户权限

show grants for root@'localhost';

+------------------------------------------------------------------------------------------------------------------------------------------------+

| Grants for test@% |

+------------------------------------------------------------------------------------------------------------------------------------------------+

| GRANT ALL PRIVILEGES ON *.* TO 'test'@'%' IDENTIFIED BY PASSWORD '*dfg' WITH GRANT OPTION |

+------------------------------------------------------------------------------------------------------------------------------------------------+

因为你的帐号权限问题才导致此错误。。。所以你要把你访问数据库的帐号的权限改一下。。

具体格式如：grant all on mysql.* to 'root'@'localhost' identified by 'password';
1。mysql.* 你访问的数据库名字。

2。root' 你的用户名

3。'password' 需要修改的密码。。

最后问题解决