MySQL 8.0.12-winx64 安装

1. 下载MySQL安装包

• 官网下载 : https://dev.mysql.com/downloads/mysql/

• 网盘下载 : https://pan.baidu.com/s/1DzzGRt8ClYzZV0a5vZT9JA 提取码: d6nf

2. 解压到合适的安装位置

• 我的解压位置：D:\MySQL\mysql-8.0.12-winx64

3. 配置环境变量

• 新建系统变量：MySQL_HOME，值为安装包解压目录：D:\MySQL\mysql-8.0.12-winx64 (此处修改为你的解压目录)

• 编辑系统变量Path，新增变量值：%MySQL_HOME%\bin

4. 新建my.ini

[mysql]
default-character-set=utf8

[mysqld]

# 以下两处修改为你的实际解压目录
# 设置MySQL的安装目录
basedir=D:\MySQL\mysql-8.0.12-winx64
# 设置MySQL的数据存放目录
datadir=D:\MySQL\mysql-8.0.12-winx64\data

port=3306
character-set-server=utf8

[client]  
default-character-set=utf8

• 在MySQL_HOME目录下，复制以上代码，新建my.ini文件。以上只包含最基本配置（其他自定义配置可参考官方文档）

5. 初始化MySQL

• 以管理员身份打开cmd命令窗口，切换到MySQL_HOME目录的bin目录下（重要）

执行初始化指令：mysqld --initialize --user=mysql --console

D:\MySQL\mysql-8.0.12-winx64\bin>mysqld --initialize --user=mysql --console
2018-09-28T01:35:41.013128Z 0 [System] [MY-013169] [Server] D:\MySQL\mysql-8.0.1
2-winx64\bin\mysqld.exe (mysqld 8.0.12) initializing of server in progress as pr
ocess 23840
2018-09-28T01:35:55.823149Z 5 [Note] [MY-010454] [Server] A temporary password i
s generated for root@localhost: dLFFgfFdF1(b
2018-09-28T01:36:03.603160Z 0 [System] [MY-013170] [Server] D:\MySQL\mysql-8.0.1
2-winx64\bin\mysqld.exe (mysqld 8.0.12) initializing of server has completed

• 此处生成的随机密码为：dLFFgfFdF1(b（后续需要用到)

6. 安装并启动MySQL服务

执行安装指令：mysqld --install

启动服务：net start MySQL

D:\MySQL\mysql-8.0.12-winx64\bin>mysqld --install
Service successfully installed.

D:\MySQL\mysql-8.0.12-winx64\bin>net start MySQL
MySQL 服务正在启动 ..
MySQL 服务已经启动成功。

7.修改初始密码

执行指令：mysql -u root -p （回车之后输入随机密码）

修改密码：ALTER USER root@localhost IDENTIFIED BY '123456';

D:\MySQL\mysql-8.0.12-winx64\bin>mysql -u root -p
Enter password: ************
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.12

Copyright (c) 2000, 2018, 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> ALTER USER root@localhost IDENTIFIED BY '123456';
Query OK, 0 rows affected (0.17 sec)

• 修改完成之后，可以先退出，再使用新密码重新登录，验证是否修改成功

8.其他

• 解除MySQL只能localhost连接

UPDATE mysql.user set host='%' WHERE user = 'root';

FLUSH PRIVILEGES;

mysql> UPDATE mysql.user SET host='%' WHERE user = 'root';
Query OK, 1 row affected (0.09 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.01 sec)