因为对于数据的每笔修改都记录在日志中,所以将对于数据的修改实时写入到磁盘并没有太大意义,即使当SQL Server发生意外崩溃时,在恢复(recovery)过程中那些不该写入已经写入到磁盘的数据会被回滚(RollBack),而那些应该写入磁盘却没有写入的数据会被重做(Redo)。从而保证了持久性(Durability) 但WAL不仅仅是保证了原子性和...
Create a Full Database Backup 下面的微软文档,介绍了SQL Server数据库的Differential backups: Differential backups (SQL Server) Create a Differential Database Backup (SQL Server) 下面的微软文档,介绍了SQL Server数据库的Transaction log backups: Transaction log backups (SQL Server) Back up a transactio...
1). RESTORE DATABASE AdventureWorks2022 FROM DISK = 'Z:\SQLServerBackups\AdventureWorks2022.bak' WITH FILE=1, NORECOVERY; --Restore the differential backup (from backup set 2). RESTORE DATABASE AdventureWorks2022 FROM DISK = 'Z:\SQLServerBackups\AdventureWorks2022.bak' WITH FILE=2,...
TO DISK = 'C:\Temp\AdventureWorks2008R2_20171112_diff.bak' WITH DIFFERENTIAL GO SSMS创建差异备份 使用SSMS IDE创建差异备份的方法: 右键点击想要创建事务日志备份的数据库 => Tasks => Backup => 选择Differential Backup Type => 选择Disk 做为备份文件存储 => 点击Add 添加备份文件 => 选择你需要存储备...
数据库完全备份(Full Backup) 数据库日志备份(Transaction Log Backup) 数据库差异备份(Differential Backup) 备份的重要性 在开始分享之前,我们首先来看看数据库备份的重要性。进入DT时代,数据的价值越发体现,数据已经成为每个公司赖以生存的生命线,数据的重要性不言而喻,而公司绝大多数核心数据都存放在数据库里。数据...
1). RESTORE DATABASE AdventureWorks2022 FROM DISK = 'Z:\SQLServerBackups\AdventureWorks2022.bak' WITH FILE=1, NORECOVERY; --Restore the differential backup (from backup set 2). RESTORE DATABASE AdventureWorks2022 FROM DISK = 'Z:\SQLServerBackups\AdventureWorks2022...
values(2,'b') backup database d4 to bak4 with differential,name='d4_diff1' insert b1 values(3,'c') backup log d4 to bak4 with name='d4_log3' insert b1 values(4,'d') backup log d4 to bak4 with name='d4_log4' insert b1 values(5,'d') backup database d4 to bak4 with...
Three recovery models exist: simple, full, and bulk-logged. The recovery model of database determines its backup and restore requirements. restore A multi-phase process that copies all the data and log pages from a specified SQL Server backup to a specified database, and then rolls ...
<backup_device> [ ,...n ] [ <MIRROR TO clause> ] [ next-mirror-to ] [ WITH { DIFFERENTIAL | <general_WITH_options> [ ,...n ] } ] [;] --Back up the transaction log (full and bulk-logged recovery models) BACKUP LOG { database_name | @database_name_var } TO <backup_...
<backup_device> [ ,...n ] [ <MIRROR TO clause> ] [ next-mirror-to ] [ WITH { DIFFERENTIAL | <general_WITH_options> [ ,...n ] } ] [;] --Back up the transaction log (full and bulk-logged recovery models) BACKUP LOG { database_name | @database_name_var } TO <backup_...