mysql-8.0.12安装教程，比5.7快2倍

下载地址：https://dev.mysql.com/downloads/mysql

可以通过命令net start mysql启动MySQL的服务了。通过命令net stop mysql停止服务。通过命令sc delete MySQL/mysqld -remove卸载 MySQL 服务；

第一步卸载；

安装包安装：

解压压缩包（32位操作系统的请解压winx32的压缩包）
添加环境变量：

G:\Develop\mysql-8.0.12-winx64中创建配置文件

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配置文件中复制下面一段进去：

[mysqld]
# Set port 3306
port=3306
# Set up mysql's installation directory
basedir=G:\\Develop\\mysql-8.0.12-winx64  
# Remember here that you have to use the double slash to be in the line, 
#and I'm going to make a mistake here, 
#but I have a single slash in the tutorial. Try it yourself
# Set up a directory of data for the mysql database
datadir=G:\\Develop\\mysql-8.0.12-winx64\\data   
# The same as above
# Maximum number of connections 
max_connections=200
# Number of connections allowed to fail. This is to prevent someone from trying to 
#attack the database system from the host
max_connect_errors=10
# The default character set used by the server is UTF8
character-set-server=utf8
# The default storage engine that will be used when creating a new table
default-storage-engine=INNODB
# By default“mysql_native_password”Plug-in authentication
default_authentication_plugin=mysql_native_password
[mysql]
# Set the mysql client's default character set
default-character-set=utf8
[client]
# Sets the default port used when mysql client connects to the server
port=3306
default-character-set=utf8

进入bin目录，执行以下dos命令：

①mysqld --initialize --console

2018-09-08T11:55:18.250655Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost
: >fAKX1%yy*gS

是初始密码。

②mysqld --install

③启动mysql后（通过命令net start mysql启动MySQL的服务）

在MySQL安装目录的 bin 目录下执行命令：mysql -u root -p

、重置密码即可；

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '新密码';

、、

可选：

创建远程登录用户：

管理员root的host是localhost，代表仅限localhost登录访问。如果要允许开放其他ip登录，则需要添加新的host。如果要允许所有ip访问，可以直接修改成“%”；
创建用户：
```
 
```
1. CREATE USER 'xxh'@'%' IDENTIFIED WITH mysql_native_password BY 'xxh123!@#';
2. grant all on *.* to root@'%'identified by 'password' 设置一个root用户允许远程登录
检查用户：
```
select user, host, plugin, authentication_string from user\G;
```
授权所有权限：
```
GRANT ALL PRIVILEGES ON *.* TO 'xxh'@'%'；
```
授权基本的查询修改权限，按需求设置：

GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,ALTER ON *.* TO 'xxh'@'%';

查看用户权限。

show grants for 'xxh'@'%';

mysql-8.0.12安装教程，比5.7快2倍

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