1. 从官网下载安装包：mysql-5.7.12-win32.zip
2. 解压到C盘（任意盘符都行）
C:\mysql-5.7.12-win32
3. 修改配置文件：C:\mysql-5.7.12-win32\my-default.ini
# For advice on how to change settings please see# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the# *** default location during install, and will be replaced if you# *** upgrade to a newer version of MySQL.[mysqld]# Remove leading # and set to the amount of RAM for the most important data# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. innodb_buffer_pool_size = 128M# Remove leading # to turn on a very important data integrity option: logging# changes to the binary log between backups.# log_bin# These are commonly set, remove the # and set as required. basedir = "C:\mysql-5.7.12-win32" datadir = "C:\mysql-5.7.12-win32\data2016" port = 3306# server_id = ...# Remove leading # to set options mainly useful for reporting servers.# The server defaults are faster for transactions and fast SELECTs.# Adjust sizes as needed, experiment to find the optimal values. join_buffer_size = 128M sort_buffer_size = 2M read_rnd_buffer_size = 2M sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
4. 配置系统环境变量path=....(之前的加上)....;C:\mysql-5.7.12-win32\bin
5. 执行如下命令：
> mysqld --initialize-insecure> mysql -install> net start mysql (或者 net start MySQL)
（如果要重新install，需要先remove：mysql --remove）
6. 如果正常的话，会显示如下信息：
C:\mysql-5.7.12-win32\bin>net start MySQLMySQL 服务正在启动 .MySQL 服务已经启动成功。
新安装的MySQL的root用户的密码是空的，所以可以直接连接：mysql -u root -p