mysql8.0.20安装教程

Posted 2022-07-30 快乐崇拜234

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mysql8 的安装先比较之前的版本复杂了一些，下面就一步一步安装。

下载

到 mysql官网 下载最新版本的mysql

下载完成后解压，并新建my.ini文件

my.ini 文件配置

my.ini文件内容：

[mysqld]
# 设置3306端口
port=3306
# 设置mysql的安装目录
basedir=C:\\Program Files\\mysql-8.0.20-winx64
# 设置mysql数据库的数据的存放目录
datadir=C:\\Program Files\\mysql-8.0.20-winx64\\Data
# 允许最大连接数
max_connections=200
# 允许连接失败的次数。
max_connect_errors=10
# 服务端使用的字符集默认为utf8mb4
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
#mysql_native_password
default_authentication_plugin=mysql_native_password
[mysql]
# 设置mysql客户端默认字符集
default-character-set=utf8mb4
[client]
# 设置mysql客户端连接服务端时默认使用的端口
port=3306
default-character-set=utf8mb4

环境变量配置

环境变量中配置MySQL的bin的地址：

初始化MySQL

以管理员权限运行CMD：

输入mysqld --initialize --console

注意，这里的root@localhost: wD3l-a.r=2yP时用户名和密码，先记录下来。

安装并启动MySQL服务

C:\\Program Files\\mysql-8.0.20-winx64\\bin>mysqld --initialize --console
2020-07-03T07:59:08.324357Z 0 [System] [MY-013169] [Server] C:\\Program Files\\mysql-8.0.20-winx64\\bin\\mysqld.exe (mysqld 8.0.20) initializing of server in progress as process 17184
2020-07-03T07:59:08.352557Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2020-07-03T07:59:09.538150Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2020-07-03T07:59:10.701709Z 6 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: wD3l-a.r=2yP

C:\\Program Files\\mysql-8.0.20-winx64\\bin>mysqld --install
Service successfully installed.

C:\\Program Files\\mysql-8.0.20-winx64\\bin>net start mysql
MySQL 服务正在启动 ..
MySQL 服务已经启动成功。

修改密码

先用刚从的初始密码登陆，然后用alter user 'root'@'localhost' identified by '123456';命令修改密码。

C:\\Program Files\\mysql-8.0.20-winx64\\bin>mysql -uroot -pwD3l-a.r=2yP
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: 8.0.20

Copyright (c) 2000, 2020, 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 (0.01 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

注意：

• 我们安装的时mysql8 版本，update mysql.user set password='newpassword' where user='root'; 和update mysql.user set password=PASSWORD('newpassword') where User='root';这两条命令已经失效。
• flush privileges;刷新命令不可以省略哦

使用新密码登陆

C:\\Program Files\\mysql-8.0.20-winx64\\bin>mysql -uroot -p123456
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 12
Server version: 8.0.20 MySQL Community Server - GPL

Copyright (c) 2000, 2020, 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> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
4 rows in set (0.02 sec)