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。