windows下安装mysql8并修改密码

MySQL下载地址：http://dev.mysql.com/downloads/mysql/

Windows下安装MySQL

我下的是最新版的MySQL，解压后，目录如下：

1.进入dos的命令行，一定要用administrator进入。
2.进入MySQL的bin目录，输入mysqld –install可以安装MySQL

cd D:\idea\mysql-8.0.18-winx64\mysql-8.0.18-winx64\bin
D:
D:\idea\mysql-8.0.18-winx64\mysql-8.0.18-winx64\bin
D:\idea\mysql-8.0.18-winx64\mysql-8.0.18-winx64>mysqld -install
Service successfully installed.

3.输入以下命令，可以初始化MySQL数据库，初始化了之后，会打印出MySQL的默认生成的密码，下面标红了的就是默认生成的密码。

D:\idea\mysql-8.0.18-winx64\mysql-8.0.18-winx64>mysqld --initialize --user=root --console
2019-12-20T02:28:44.093039Z 0 [System] [MY-013169] [Server] D:\idea\mysql-8.0.18-winx64\mysql-8.0.18-winx64\bin\mysqld.exe (mysqld 8.0.18) initializing of server in progress as process 7500
2019-12-20T02:28:51.796888Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: 4IfH4*eywsg=

初始化了以后，可以看到MySQL目录下，多了data目录
4.启动MySQL服务

D:\idea\mysql-8.0.18-winx64\mysql-8.0.18-winx64>net start mysql
MySQL 服务正在启动 ..
MySQL 服务已经启动成功。

5.使用默认生成的密码，进入mysql

D:\idea\mysql-8.0.18-winx64\mysql-8.0.18-winx64>mysql -u root -p4IfH4*eywsg=
mysql: [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 11
Server version: 8.0.18

Copyright (c) 2000, 2019, 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>

6.修改密码

mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123';
Query OK, 0 rows affected (0.01 sec)

7.退出，修改成功