在上一篇文章中,成功的重建了oracle的控制文件,实例也可以正常启动到open的状态后;马上开始备份数据库,详细步骤如下:1.创建存放备份文件的路径C:UsersAdministrator>sqlpluusas sysdb

146.Identify three situations in which you would NOT be able to drop a tablespace. (Choose three.)A.when the tablespace