1）mysql官网下载源码 https://dev.mysql.com/downloads/mysql/

2）安装与配置文件

在解压后的mysql包中新建 my.ini文件

my.ini文件中需要添加的内容如下：

[client] port=3306 default-character-set=utf8mb4 [mysql] default-character-set=utf8mb4 [mysqld] #端口 port=3306 # 软件路径 basedir="F:/Program Files/mysql-8.0.15-winx64" # 数据保存位置 datadir="F:/Program Files/mysql-8.0.15-winx64/Data" # 允许最大连接数 max_connections=5 # 允许连接失败的次数。这是为了防止有人从该主机试图攻击数据库系统 max_connect_errors=3 # 服务端使用的字符集默认为UTF8（UTF8MB3） character-set-server=utf8mb4 # 创建新表时将使用的默认存储引擎 default-storage-engine=INNODB # 默认使用“mysql_native_password”插件认证 default_authentication_plugin=mysql_native_password max_connections=10000

3）数据库初始化

以管理员身份运行命令提示符，进入MySQL安装目录的 bin 目录下执行命令：mysqld --initialize --console，不知道怎么进入bin目录，可以去百度，这里就不详细说明

F:\Program Files\mysql-8.0.15-winx64\bin>mysqld --initialize --console [Server] C:\Program Files\MySQL\bin\mysqld.exe (mysqld 8.0.11) initializing of server in progress as process 4984 [Server] A temporary password is generated for root@localhost: fQaP#D1RFMeF

4）安装和启动数据库服务

PS F:\Program Files\mysql-8.0.15-winx64\bin> mysqld --install Service successfully installed. PS F:\Program Files\mysql-8.0.15-winx64\bin> net start mysql MySQL 服务正在启动 .. MySQL 服务已经启动成功。

5）登陆和更换密码

在MySQL安装目录的 bin 目录下执行命令：mysql -u root -p，然后输入初始化时的到密码，进入成功之后，在MySQL中执行命令：ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '新密码'；，如下图所示，成功修改密码

PS F:\Program Files\mysql-8.0.15-winx64\bin> mysql -uroot -p Enter password: ************ Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 8 Server version: 8.0.15 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> use mysql; ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement. mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'test123'; Query OK, 0 rows affected (0.08 sec) mysql>

可以用 命令查看一下默认安装的数据库：show databases

mysql> show databases -> ; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | sys | +--------------------+ 4 rows in set (0.00 sec) mysql>