％在主机列中代表什么，以及如何更改用户密码？
本地主机意味着您可以从同一台计算机进行访问，而可以从％进行远程主机访问。更改用户密码的语法如下。
SET PASSWORD FOR 'yourUserName'@'localhost' ='yourPassword';
首先从MySQL.user表中检查用户和主机。查询如下-
mysql> select user,host from MySQL.user;
这是输出-
+------------------+-----------+ | user | host | +------------------+-----------+ | Bob | % | | Manish | % | | User2 | % | | mysql.infoschema | % | | mysql.session | % | | mysql.sys | % | | root | % | | @UserName@ | localhost | | Adam Smith | localhost | | James | localhost | | John | localhost | | John Doe | localhost | | User1 | localhost | | am | localhost | | mysql.infoschema | localhost | | mysql.session | localhost | +------------------+-----------+ 16 rows in set (0.01 sec)
现在，让我们更改用户“John”的密码。查询如下-
mysql> SET PASSWORD FOR 'John'@'localhost' ='John123456';
之后，您需要设置刷新权限。查询如下-
flush privileges;