windows安装多个mysql
下载mysql
配置mysql的文件
启动数据库
如何破解，修改数据库的用户名和密码
一：下载mysql
下载地址：
https://cdn.mysql.com//Downloads/MySQL-5.6/mysql-5.6.43-winx64.zip
复制下面的文件：如图
我在c盘下面放了这些文件：创建了两个目录3306，3307，将这些文件放在下面：
C:\database\3307
C:\database\3306
二：修改配置文件
C:\database\3306\my-default.ini
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
port=3306
basedir=C:/database/3306
datadir=C:/database/3306/data
C:\database\3307\my-default.ini
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
port=3307
basedir=C:/database/3307
datadir=C:/database/3307/data
总结：配置文件只要修改三个内容：port ,basedir ,datadir
三：启动3306，3307的数据库
注意：cmd命令行需要以管理员的身份运行，管理员的权限
执行下面的命令启动3306的mysql
cd C:\database\3306\bin
mysqld install 3306 --defaults-file="C:\database\3307\my-default.ini"
net start 3306
mysql -u root
mysql> update mysql.user set password=password("123") where user="root" and host="localhost";
Query OK, 0 rows affected (0.00 sec)
Rows matched: 1 Changed: 0 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> exit
执行下面的命令启动3306的mysql
cd C:\database\3307\bin
mysqld install 3307 --defaults-file="C:\database\3307\my-default.ini"
net start 3307
mysql -u root
mysql> update mysql.user set password=password("123") where user="root" and host="localhost";
Query OK, 0 rows affected (0.00 sec)
Rows matched: 1 Changed: 0 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> exit
测试：
由于没有设置环境变量，所以测试的时候需要切换到bin目录下，使用mysql客户端的命令来测试数据库服务器是否可以连接，切换到3306或3307的任意一个bin目录下就可以了。
cd c:\database\3307\bin
mysql -u root -p -P 3307
mysql -u root -p -P 3307
四：如果你忘了自己数据库的用户名和密码：
你需要跳过授权表登录，就是不需要输入密码就可以进入数据库，然后通过sql命令修改数据库root的密码：
1：关闭mysql服务
net stop 3306
2：启动mysql服务
cd c:\database\3307\bin
mysql --skip-grant-tables
3：进入mysql
mysql -u root -p 直接回车，按enter键
4：修改密码
mysql> update mysql.user set password=password("123") where user="root" and host="localhost";
Query OK, 0 rows affected (0.00 sec)
Rows matched: 1 Changed: 0 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> exit
5：杀掉这个mysql服务的进程
在2步骤直接按ctrl+c 就可以停止服务了
或者
tasklist | findstr mysql
taskkill /F /PID 进程的pid
这个命令适用于单个服务。
6：启动mysql服务
net start 3306
测试：略