Mysql-5.7.21-winx64 绿色版安装

1.下载
https://dev.mysql.com/downloads/mysql/



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



4.管理员方式启动命令提示窗符
进入mysql解压目录到bin目录下
如：D:\Program Files\mysql-5.7.21-winx64\bin



分别执行：
（1）初始化：mysqld -initialize-insecure



如果报错failed to set datadir to 则 执行一下  mysqld --initialize --user=mysql --console，再执行（1）；
正确之后会在Mysql解压根目录生成data文件夹以及相关文件
（2）mysqld -install



*如提示Install/Remove of the Service Denied，说明不是已管理员的方式进入的命令提示符
（3）启动服务：net start mysql



（4）登陆，改密码 mysql -u root -p 
【成功登陆的直接到（5）】
我的出现了



在my.ini中增加



重启服务，成功登陆



（5）执行改密码语句 （正常登陆的使用set password= password(‘新密码’);）
update user set authentication_string = password("新密码") where user='root';



（6）exit;  net stop mysql



(7)登陆成功的忽略这一步



到my.ini中注释掉
重启进入之后set password= password(‘新密码’);



到此就可以正常使用了。
（8）测试 show databases;



5.写两个bat文件用于启动和关闭mysql服务
（1）启动mysql服务@echo off
echo 确定要启动MySQL服务吗？
pause
net start mysql
echo 启动MySQL服务完成，请确认有没有错误发生。
Pause保存为   mysql服务启动.bat   文件，运行时要以管理员方式运行


（2）关闭mysql服务

@echo off
echo 确定要关闭MySQL服务吗？
pause
net stop mysql
echo 关闭MySQL服务完成，请确认有没有错误发生。
Pause

保存为   mysql服务关闭.bat   文件，运行时要以管理员方式运行



MySql到此安装结束。