MySQL 似乎删除了用户，但用户仍然存在于 MySQL.users 表中?
mysqlmysqli database
首先使用 select 语句检查 MySQL.user 表中的所有用户和主机，如下所示
mysql> select user,host from MySQL.user;
以下是输出 −
+------------------+-----------+ | 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 | | hbstudent | localhost | | mysql.infoschema | localhost | | mysql.session | localhost | +------------------+-----------+ 17 rows in set (0.00 sec)
现在，从 MySQL.user 表中删除用户"hbstudent"。查询如下 −
mysql> drop user 'hbstudent'@'localhost'; Query OK, 0 rows affected (0.17 sec)
现在检查 MySQL.user 表以验证用户是否仍然存在于 MySQL.user 表中。查询如下 −
mysql> select user,host from MySQL.user;
以下是输出 −
+------------------+-----------+ | 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 (0.00 sec)
