在使用MYSQL数据库的时候,第一次登录的时候,root默认没有密码。在使用过程中难免会忘记root用户的密码,密码不正确的时候,报如下错误:
I:\Develop\mysql-5.6.19\bin>mysql -u root -p
Enter password:
ERROR 1045 (28000): Access denied for user ‘root‘@‘localhost‘ (using password: NO)
具体修改root密码如下:
1.执行"net stop mysql"命令,停止mysql服务
I:\Develop\mysql-5.6.19\bin>net stop mysql
mysql 服务正在停止.
mysql 服务已成功停止。
2. 修改mysql服务对应的ini文件,如我的mysql服务对应的文件为:my-db.ini
在该配置文件中添加如下参数:
[mysqld]
skip-grant-tables
该参数作用:就是在启动mysql时不启动grant-tables授权表。
3.启动mysql服务,执行修改密码操作
#启动服务
I:\Develop\mysql-5.6.19\bin>net start mysql
mysql 服务正在启动 .
mysql 服务已经启动成功。
#以root登录
I:\Develop\mysql-5.6.19\bin>mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 1 Server version: 5.6.19 MySQL Community Server (GPL)
Copyright (c) 2000, 2014, 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.
#切换到mysql数据库
mysql> use mysql;
Database changed
#执行update命令修改
mysql> update user set password=password("root") where user="root";
Query OK, 2 rows affected (0.03 sec) Rows matched: 3 Changed: 2 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
#修改完成退出
mysql> quit;
Bye
#停止mysql服务
I:\Develop\mysql-5.6.19\bin>net stop mysql
mysql 服务正在停止.
mysql 服务已成功停止。
4. 修改mysql服务对应的配置文件”my-db.ini“
[mysqld]
#注释第2步添加的操作
#skip-grant-tables
5.重新启动mysql服务
I:\Develop\mysql-5.6.19\bin>net start mysql
mysql 服务正在启动 .
mysql 服务已经启动成功。
#服务启动之后,重新登录系统,登录成功
I:\Develop\mysql-5.6.19\bin>mysql -uroot -proot
Warning: Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.6.19 MySQL Community Server (GPL)
Copyright (c) 2000, 2014, 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>
注意:
关注一下Oracle的修改sys用户的密码。需要用到orapwd命令进行修改
orapwd file=D:\oracle10g\database\pwdctcsys.ora password=newpass
这个命令重新生成了数据库的密码文件。密码文件的位置在ORACLE_HOME目录下的\database目录下。
oracle中,在Oracle数据库服务器环境上:conn / as sysdba; alter sys identified by sys; 并不能真正的修改sys的密码
Windows环境修改MYSQL的root用户密码,布布扣,bubuko.com