日常吐槽
因为PowerDesigner 需要32位的MySql，那只好再装一个呗，本以为是分分钟的事，好家伙！！！由于本来电脑里就有环境，结果进了好几个坑…
安装
绿色版地址 https://pan.baidu.com/s/1rU-S644jv1z32BiN-FM_YA 提取码：epu9
安装步骤：
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配置环境变量
把bin 的地址配置到环境变量的path中，F:\software\mysql-5.7.18-win32\bin
（第一个坑：我用了同事写的配环境变量的工具，这个工具默认从尾部添加，因为本来电脑里装了8.0的mysql，path里自动配置过了8.0的环境变量，导致后面启动服务出错…所以强烈建议 新的环境变量从头开始添加！！！） -
在F:\software\mysql-5.7.18-win32 下创建my-default.ini文件 并修改basedir 和datadir的内容
（第二个坑：原本我建的是my.ini 文件，但是后面一直启动服务失败，改成my-default.ini就没问题了）
# 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 = F:\software\mysql-5.7.18-win32
datadir = F:\software\mysql-5.7.18-win32\data
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
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用管理员权限运行cmd，并进入bin文件夹
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执行mysqld -install安装成服务，如果之前有安装过，则卸载(mysqld -remove)后再执行安装;
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运行mysqld --initialize --console 生成data文件夹，
并记住生成的密码
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启动服务：net start mysql；或者通过右键计算机-管理-服务，找到MYSQL开启，设置成自动；
（如果提示net 不是内部命令，配置path环境变量 %SystemRoot%\system32，配置完环境变量需要重新打开cmd，不然原本的cmd用的是老的环境变量。如果本来系统里配置过了还是提示，删了，放在开头） -
登入并修改密码
F:\software\mysql-5.7.18-win32\bin>mysql -uroot -p //登录mysql
Enter password: ************ //密码就是输入的密码
mysql> set password=password('root'); //修改密码
Query OK, 0 rows affected, 1 warning (0.00 sec)
- 授权远程连接权限：grant all privileges on . to root@’%’ identified by ‘root’;