执行BACKUP DATABASE 语句可以创建差异数据库备份,同时指定: 要备份的数据库的名称。 写入完整数据库备份的备份设备。 DIFFERENTIAL 子句,用于指定仅备份自上次创建完整数据库备份之后已更改的数据库部分。 要求语法为: BACKUP DATABASE database_name TO <backup_device> WITH DIFFERENTIAL...
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 full backup zeroizes the SQL differential backup size. Three Ways to Perform SQL Differential Backup Let’s consider three ways how to make SQL differential backup With the help of the T-SQL command: With the help of the following T-SQL command, you can make SQL differential backup, it...
差异备份 (differential backup) 一种数据备份,基于完整数据库或部分数据库或一组数据文件或文件组(差异基准)的最新完整备份,并且仅包含自确定差异基准以来发生更改的数据。 完整备份 (full backup) 一种数据备份,包含特定数据库或者一组特定的文件组或文件中的所有数据,以及可以恢复这些数据的足够的日志。
1. LaunchSSMSand connect to your instance. 2. ClickNew Queryon the upper bar and input the following T-SQL Commands: USE master GO BACKUP DATABASEdatabasenameTO DISK = 'filepath\filename.bak' WITH DIFFERENTIAL GO Note: In “databasename” part you should type the database name you want...
This example creates a full and a differential database backup for the MyAdvWorks database.复制 -- Create a full database backup first. BACKUP DATABASE MyAdvWorks TO MyAdvWorks_1 WITH INIT GO -- Time elapses. -- Create a differential database backup, appending the backup -- to the ...
GO-- Now restore the differential database backup, the second backup on-- the MyAdvWorks_1 backup device.RESTOREDATABASEMyAdvWorksFROMMyAdvWorks_1WITHFILE=2, NORECOVERY; GO-- Now restore each transaction log backup created after-- the differential database backup.RESTORELOGMyAdvWorksFROMMyAdvWo...
For more information, see How to: Restore a Full Backup. Execute the RESTORE DATABASE statement to restore the differential database backup, specifying: The name of the database to which the differential database backup is applied. The backup device where the differential database backup is ...
First, you need to restore the full backup (FILE 1). Then, restore the differential backup (FILE 2). In above example, the full backup is inNORECOVERYmode, which means that it is not available because it is waiting for theFILE 2to restore. ...
Select Tasks > Backup Select “Differential” as the backup type Select “Disk” as the destination Click on “Add…” to add a backup file and type “C:\AdventureWorks.DIF” and click “OK” Click “OK” again to create the backup...