Restoring a Database Using Full and Differential Backups
Restoring a Database Using Full and Differential Backups
Write a SQL query to restore a database using both full and differential backups.
Solution:
-- Restore the full backup first.
RESTORE DATABASE MyDatabase
FROM DISK = 'C:\Backups\MyDatabase_Full.bak'
WITH NORECOVERY;
-- Restore the differential backup.
RESTORE DATABASE MyDatabase
FROM DISK = 'C:\Backups\MyDatabase_Diff.bak'
WITH RECOVERY;
Explanation:
- Purpose of the Query :
- The goal is to demonstrate how to restore a database using both full and differential backups.
- Key Components :
- WITH NORECOVERY: Leaves the database in a restoring state for additional backups.
- WITH RECOVERY: Brings the database online after the final restoration step.
- Why Use Combined Restores?:
- Combining full and differential backups reduces recovery time compared to restoring from a full backup alone.
- It ensures minimal data loss.
- Real-World Application :
- In production environments, this approach restores databases quickly after failures.
Notes:
- Always restore backups in the correct order: full → differential → transaction logs (if applicable).
- Test restoration procedures to ensure compatibility.
- Ensure backups are valid and accessible before restoration.
For more Practice: Solve these Related Problems:
- Write a SQL query to restore a database named "SalesDB" using a full backup and a subsequent differential backup.
- Write a SQL query to restore a database named "HRDatabase" from a full backup and a differential backup, ensuring the database remains offline until restoration is complete.
- Write a SQL query to restore a database named "InventoryDB" using a full backup and a differential backup, and then apply transaction log backups for point-in-time recovery.
- Write a SQL query to restore a database named "FinanceDB" from a full backup and a differential backup, and bring the database online immediately after restoration.
Go to:
PREV : Creating a Differential Backup.
NEXT : Creating a Transaction Log Backup.
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