本文记录了mysql 5.7.21安装配置方法，具体内容如下

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1.下载

下载地址

解压到自己喜欢的一个位置即可（目录中不要包含中文）

如：D:\Program Files\

2.系统环境变量配置

（1）新增系统变量 

         变量名：MYSQL_HOME
         变量值：Mysql解压目录，如D:\Program Files\mysql-5.7.21-winx64

（2）追加PATH

         ;%MYSQL_HOME%\bin;

3.配置my.ini文件

在解压根目录新建一个my.ini的文件

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/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 = "D:\\Program Files\mysql-5.7.21-winx64"
 datadir = "D:\\Program Files\mysql-5.7.21-winx64\data"
 port = 3306
 character_set_server = utf8
 
# 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

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