Under the full recovery model, you should then restore all subsequent transaction log backups. The restored database matches the state of the original database when the database backup finished, minus any uncommitted transactions. Enough of the transaction log is included in the backup to let you recover the database to the time when the backup finished. You can re-create a whole database in one step by restoring the database from a full database backup to any location. Create a routine log backup (backup set 2).īACKUP LOG AdventureWorks2012 TO DISK = 'Z:\SQLServerBackups\AdventureWorks2012FullRM.bak' TO DISK = 'Z:\SQLServerBackups\AdventureWorks2012FullRM.bak' Back up the AdventureWorks2012 database to new media set (backup set 1). USE master ĪLTER DATABASE AdventureWorks2012 SET RECOVERY FULL For this example, the AdventureWorks2019 sample database is set to use the full recovery model. In a real-life situation, you would have to perform a series of regular log backups. Then, the example backs up the transaction log. The following example shows how to create a full database backup by using WITH FORMAT to overwrite any existing backups and create a new media set. The following illustration shows the least complex backup strategy that is possible under the full recovery model.įor information about how to create log backups, see Transaction Log Backups (SQL Server). Transaction log backups are also required. TO DISK = 'Z:\SQLServerBackups\AdventureWorksSimpleRM.bak'įor databases that use full and bulk-logged recovery, database backups are necessary but not sufficient. Back up the AdventureWorks2012 database to new media set. The following illustration shows the work-loss exposure for a backup strategy that uses only full database backups. Work-loss exposure increases over time between backups. The work-loss exposure increases with each update until the next backup, when the work-loss exposure returns to zero and a new cycle of work-loss exposure starts. Under the simple recovery model, after each backup, the database is exposed to potential work loss if a disaster were to occur. Use a Full Database Backup to Restore the Database For information about how to set TRUSTWORTHY to ON, see ALTER DATABASE SET Options (Transact-SQL).ĭatabase Backups Under the Simple Recovery Modelĭatabase Backups Under the Full Recovery Model TRUSTWORTHY is set to OFF on a database backup.
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