相关疑难解决方法(0)

在Oracle文档描述化身为：

化身

一个单独的数据库版本。使用 RESETLOGS 选项打开数据库时，数据库的化身会发生变化，但只要有必要的重做可用，您就可以从先前的化身恢复备份。

但我仍然不能完全理解它。谁能用通俗易懂的方式给我解释一下？

谢谢，

我正在 SQL Server 2017 上运行加密备份。

进行测试恢复，失败：

RESTORE DATABASE [test] 
FROM DISK = N'\\DPH-DD-SLI-001\SLI_SQL_Backups\Encrypted\DPH-SQL-SLI-12P\BTBLEAD\FULL\DPH-SQL-SLI-12P_BTBLEAD_FULL_20201021_185145.bak' 
WITH NORECOVERY, REPLACE; 

RESTORE DATABASE [test] 
FROM DISK = N'\\DPH-DD-SLI-001\SLI_SQL_Backups\Encrypted\DPH-SQL-SLI-12P\BTBLEAD\DIFF\DPH-SQL-SLI-12P_BTBLEAD_DIFF_20201022_071002.bak' 
WITH NORECOVERY; 

Processed 199264 pages for database 'test', file 'BTBLEAD_Data' on file 1.
Processed 2 pages for database 'test', file 'BTBLEAD_Log' on file 1.
RESTORE DATABASE successfully processed 199266 pages in 446.348 seconds (3.487 MB/sec).
Msg 3136, Level 16, State 1, Line 6 This differential backup cannot be restored
because the database has not been restored to …