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2023-12-04
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-f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-f:
vim/etc/my-f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 | +-----------+---------------+-------------------------------------------+ 4rowsin 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-f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-f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 ismarkedas 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 at40 | | mysql.user | repair | info | Found block that points outside data file at 44 | | mysql.user | repair | info |Found block that points outside data file at48 | | 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 from4 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 inset (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-f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
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