1.used for describing computer information that is impossible to get back once it has been lost or deleted
1.A controlled premature termination of processing activity in a computer system because of a mistake, nonrecoverable error, or malfunction.
由于事故、不可恢复的错误或故障,以一种受控制的方式提前结束计算机系统内的处理活动。
2.When specifying this NONRECOVERABLE keyword, the user is not forced to take backups of the tablespaces immediately.
如果指定这个NONRECOVERABLE关键字,那么用户不必马上对表空间进行备份。