mac下mysql的卸载和安装

1. mysql的卸载

1 sudo rm /usr/local/mysql
2 sudo rm -rf /usr/local/mysql*
3 sudo rm -rf /Library/StartupItems/MySQLCOM
4 sudo rm -rf /Library/PreferencePanes/My*
5 vim /etc/hostconfig (and removed the line MYSQLCOM=-YES-)
6 rm -rf ~/Library/PreferencePanes/My*
7 sudo rm -rf /Library/Receipts/mysql*
8 sudo rm -rf /Library/Receipts/MySQL*
9 sudo rm -rf /var/db/receipts/com.mysql.*

在我的mac上没有Library文件夹，故6、7、8操作执行

2.下载mysql免费版

https://downloads.mysql.com/archives/community/

3.下载后dmg文件后，双击后一步步安转

4.生成一个密码，待登录到mysql后，可以修改密码；

5. 启动mysql服务

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sudo mysqld --user=mysql &    //不能用root用户启动

6.修改密码

SET PASSWORD FOR'root'@'localhost'=PASSWORD('new password');
flush privileges;