MacOs执行SQL出错(mysql)

上次修改过root密码之后，刚启动，执行sql就报错了。

错误是：

Reset MySQL root password using ALTER USER statement after install on Mac

解决办法是：

https://stackoverflow.com/questions/33467337/reset-mysql-root-password-using-alter-user-statement-after-install-on-mac
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UPDATE mysql.user SET Password=PASSWORD('your_new_password')
       WHERE User='root';