选中设备,然后添加进备份的文件,点击确定即可。 :微软官方文档https://docs.microsoft.com/zh-cn/sql/relational-databases/backup-restore/restore-a-differential-database-backup-sql-server?view=sql-server-ver15
It means that SQL differential backup is not incremental but cumulative. Look at the following picture to understand what data is stored in a differential backup: How SQL Differential Backup Works Each Global Allocation Map interval (GMA interval) covers 64,000 extents (one extent is a collectio...
完成完整备份后,可以进行差异备份: -- 创建一个差异备份BACKUPDATABASE[YourDatabaseName]TODISK='C:\Backup\YourDatabaseName_Diff.bak'WITHDIFFERENTIAL,INIT; 1. 2. 3. 4. WITH DIFFERENTIAL表示执行差异备份。 其余参数与完整备份相同。 步骤3:模拟数据更改 为了演示,您可以向数据库中插入一些新数据。这些数据...
在使用 VSS 启动备份操作时,请求者可以通过在备份组件文档中设置DIFFERENTIAL选项VSS_BT_DIFFERENTIAL来发出差异备份。 SQL 编写器将部分文件信息(由 SQL Server 返回)传递给 VSS。 请求者可以通过调用 VSS API 的IVssComponent::GetPartialFile来获取此文件信息。 此部分文件信息允许请求者只选择已更改的字节范...
如果在数据库只读时采用差异基准,则差异位图指示的更改会比基准备份之后实际发生的更改更多。 额外的数据由备份读取,但不会写入到备份中,因为存储在backupset系统表中的differential_base_lsn用于确定是否在基准备份之后更改了数据。 重新构建、还原只读数据库或者分离再重新附加只读数据库后,会丢失差异基准信息。 这是由于...
A differential backup is created similarly to a full backup, but with one important difference – the differential backup only contains the data that has changed since the last full backup (the active portion of the transaction log).Differential backups are cumulative not incremental. This means ...
當使用 VSS 起始備份作業時,要求者可以在備份元件檔中IVssBackupComponents::SetBackupState設定DIFFERENTIAL選項VSS_BT_DIFFERENTIAL,以發出差異備份。 SQL 寫入器會將部分檔案資訊(由 SQL Server 傳回)傳遞至 VSS。 要求者可以藉由呼叫 VSS API 的IVssComponent::GetPartialFile來取得此檔案資訊。 此部分檔案資...
The job failed with the following error: The Backup Exec SQL Agent was not used to create the last full, differential, or log backup for this database. You must use the SQL Agent to run a full backup before you can run a differential backup or transaction log backup. ...
-- Back up the AdventureWorks2022 database to new media set.BACKUPDATABASEAdventureWorks2022TODISK ='Z:\SQLServerBackups\AdventureWorksSimpleRM.bak'WITHFORMAT; GO 完整恢复模式下的数据库备份 对于使用完整恢复模式和大容量日志恢复模式的数据库而言,数据库备份是必需的,但并不足够。 还需要事务日志备份。 下...
Differential backups are not supported for secondary replicas. After you apply this fix, the correct error message is displayed: Msg 3059, Level 16, State 1, LineLineNumber This BACKUP or RESTORE command is not supported on a data...