教你如何处理mysql中user表没有的问题
发布时间：2023-04-25 13:43:22 所属栏目：MySql教程 来源：
导读：这篇文章将为大家详细讲解有关如何解决mysql中user表没有的问题，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
mysql user表没有了的解决办法：1、在“[mysqld]&rdq
mysql user表没有了的解决办法：1、在“[mysqld]&rdq
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这篇文章将为大家详细讲解有关如何解决mysql中user表没有的问题，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。 mysql user表没有了的解决办法：1、在“[mysqld]”中添加“skip-grant-tables”；2、编辑my.cnf配置文件，添加“sql_mode=NO_ENGINE_SUBSTITUTION”；3、重启mysql服务。 本文操作环境：Windows7系统，mysql5.5版，Dell G3电脑。 mysql 忘记密码，重置密码，mysql.user表为空的解决办法： 一、用户表有用户，直接修改密码 ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) 修改mysql配置文件my.cnf： vim /etc/my.cnf 在[mysqld]中添加 skip-grant-tables 重启mysql服务，用空密码直接登录，查询用户表，有结果则按如下步骤修改，结果为空直接最后的解决办法 mysql> select Host,User,authentication_string from mysql.user; +-----------+---------------+-------------------------------------------+ | Host | User | authentication_string | +-----------+---------------+-------------------------------------------+ | localhost | root | *6A7A490FB9DC8C33C2B025A91737077A7E9CC5E5 | | localhost | mysql.session | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE | | localhost | mysql.sys | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE | | % | root | *6A7A490FB9DC8C33C2B025A91737077A7E9CC5E5 | +-----------+---------------+-------------------------------------------+ 4 rows in set (0.00 sec) 修改对应用户的密码 # 重置密码为 123456 mysql> update mysql.user set authentication_string=password('123456') where user='root' Query OK, 2 rows affected, 1 warning (0.00 sec) Rows matched: 2 Changed: 2 Warnings: 1 # 刷新权限，使配置生效 mysql> FLUSH PRIVILEGES; Query OK, 0 rows affected (0.00 sec) # 退出 mysql> quit Bye 取消或注释掉my.cnf配置文件添加的选项 skip-grant-tables ，重启mysql服务，搞定收工。 二、用户表没有数据，则需要插入用户数据 mysql> select Host,User,authentication_string from mysql.user; Empty set (0.00 sec) # 退出登陆 mysql> exit Bye 编辑my.cnf配置文件，添加或修改下面两项（我这没有sql_mode项）： sql_mode=NO_ENGINE_SUBSTITUTION skip-grant-tables 停止mysql服务，启动数据库的安全模式：mysqld_safe & 使用root 空密码连接数据库： mysql -uroot -p 插入root用户数据 mysql> insert into mysql.user(Host,User,authentication_string) values("%","root",password("123456")); Query OK, 1 row affected, 4 warnings (0.00 sec) 再次查询mysql.user表，会报错 mysql> select Host,User,authentication_string from mysql.user; ERROR 1194 (HY000): Table 'user' is marked as crashed and should be repaired 需要修复mysql.user表 mysql> REPAIR TABLE mysql.user; +------------+--------+----------+-------------------------------------------------+ | Table | Op | Msg_type | Msg_text | +------------+--------+----------+-------------------------------------------------+ | mysql.user | repair | info | Wrong bytesec: 113-108- 95 at 396; Skipped | | mysql.user | repair | info | Found block that points outside data file at 32 | | mysql.user | repair | info | Found block that points outside data file at 36 | | mysql.user | repair | info | Found block that points outside data file at 40 | | mysql.user | repair | info | Found block that points outside data file at 44 | | mysql.user | repair | info | Found block that points outside data file at 48 | | mysql.user | repair | info | Found block that points outside data file at 52 | | mysql.user | repair | info | Found block that points outside data file at 56 | | mysql.user | repair | info | Found block that points outside data file at 60 | | mysql.user | repair | warning | Number of rows changed from 4 to 3 | | mysql.user | repair | status | OK | +------------+--------+----------+-------------------------------------------------+ 11 rows in set (0.64 sec) # 再次查询user表 mysql> select Host,User,authentication_string from mysql.user; +-----------+---------------+-------------------------------------------+ | Host | User | authentication_string | +-----------+---------------+-------------------------------------------+ | localhost | mysql.session | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE | | localhost | mysql.sys | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE | | % | root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 | +-----------+---------------+-------------------------------------------+ 3 rows in set (0.00 sec) 修改root用户的权限： update mysql.user set `Select_priv` = 'Y', `Insert_priv` = 'Y', `Update_priv` = 'Y', `Delete_priv` = 'Y', `Create_priv` = 'Y', `Drop_priv` = 'Y', `Reload_priv` = 'Y', `Shutdown_priv` = 'Y', `Process_priv` = 'Y', `File_priv` = 'Y', `Grant_priv` = 'Y', `References_priv` = 'Y', `Index_priv` = 'Y', `Alter_priv` = 'Y', `Show_db_priv` = 'Y', `Super_priv` = 'Y', `Create_tmp_table_priv` = 'Y', `Lock_tables_priv` = 'Y', `Execute_priv` = 'Y', `Repl_slave_priv` = 'Y', `Repl_client_priv` = 'Y', `Create_view_priv` = 'Y', `Show_view_priv` = 'Y', `Create_routine_priv` = 'Y', `Alter_routine_priv` = 'Y', `Create_user_priv` = 'Y', `Event_priv` = 'Y', `Trigger_priv` = 'Y', `Create_tablespace_priv` = 'Y' where user='root'; # 更新权限 mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) # 退出登陆 mysql> exit Bye 退出mysql，将my.cnf配置文件的修改恢复 结束mysqld_safe 进程：pkill mysql 启动mysql服务: systemctl start mysql 问题解决！ （编辑：聊城站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
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