Restore Database in SQL Server

Understanding Database Restore

Restoring a database means applying backup files to bring the database back to a previous state. This can be a full restore or a point-in-time recovery.

There are three main types of backups used in restore operations: full backups, differential backups, and transaction log backups.

• Full backup: A complete copy of the database at a point in time.
• Differential backup: Contains changes since the last full backup.
• Transaction log backup: Captures all transaction log records since the last log backup.

Restore Database Using T-SQL

You can restore databases using the RESTORE DATABASE command in T-SQL. This command supports various options to control the restore process.

Basic syntax to restore a full backup is:

• RESTORE DATABASE [DatabaseName] FROM DISK = 'BackupFile.bak' WITH REPLACE;

Restore Database Using SQL Server Management Studio (SSMS)

SSMS provides a graphical interface to restore databases, making it easier for beginners.

To restore a database in SSMS, right-click the Databases node, select Restore Database, and follow the wizard.

• Select the source backup file or device.
• Choose the destination database name.
• Configure restore options like overwriting existing database and recovery state.
• Review and execute the restore operation.

Restore Options and Considerations

When restoring, consider options such as:

The recovery state: WITH RECOVERY, NORECOVERY, or STANDBY determines if the database is operational or can accept additional restores.

Overwriting existing databases with REPLACE.

Moving database files to different locations using MOVE.

• WITH RECOVERY: Finalizes the restore and brings the database online.
• WITH NORECOVERY: Leaves the database non-operational for additional restores.
• WITH STANDBY: Allows read-only access between restores.
• MOVE: Redirects database files to new paths.