一、用户操作:用户锁定和解锁/密码设置: alter user [USER] account lock; alter user [USER] account unlock; alter user scott identified by tiger; select * from dba_users; --查看用户信息表创建用户:create user [USER] identified by [PASSWD]; 删除用户:drop user [USER] cascade; 简单赋权对于权限...