1打开mysql.exe和mysqld.exe所在的文件夹,复制路径地址
输入命令 mysqld –skip-grant-tables 回车，此时就跳过了mysql的用户验证。注意输入此命令之后命令行就无法操作了，此时可以再打开一个新的命令行。注意：在输入此命令之前先在任务管理器中结束mysqld.exe进程，确保mysql服务器端已结束运行。
输入mysql登陆
C:\Users\Administrator>mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is
Server version: 5.5. MySQL Community Server (GPL)
Copyright (c) , , Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| itcastoa0720 |
| kingoa |
| mysql |
| performance_schema |
| qin |
| student |
| test |
+--------------------+
rows in set (0.01 sec) mysql> use mysql
Database changed
mysql> show tables;
+---------------------------+
| Tables_in_mysql |
+---------------------------+
| columns_priv |
| db |
| event |
| func |
| general_log |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| host |
| ndb_binlog_index |
| plugin |
| proc |
| procs_priv |
| proxies_priv |
| servers |
| slow_log |
| tables_priv |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| user |
+---------------------------+
rows in set (0.01 sec) mysql> select user,host,password from user;
+------+-----------+-------------------------------------------+
| user | host | password |
+------+-----------+-------------------------------------------+
| root | localhost | *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B |
+------+-----------+-------------------------------------------+
row in set (0.00 sec) mysql> update user set password=password('') where user='root' and host='l
ocalhost';
Query OK, row affected (0.00 sec)
Rows matched: Changed: Warnings: mysql> select user,host,password from user;
+------+-----------+-------------------------------------------+
| user | host | password |
+------+-----------+-------------------------------------------+
| root | localhost | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
+------+-----------+-------------------------------------------+
row in set (0.00 sec) mysql>
重新打开一个cmd命令窗口，测试
C:\Users\Administrator>mysql -u root -p123456
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is
Server version: 5.5. MySQL Community Server (GPL) Copyright (c) , , Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
