How to restore sqlserver database after separation

When the SQL Server database is detached, you can restore the data by following the following steps: 1. Reconnect the database file; 2. Restore the log file; 3. Restore the data; 4. Check the database; 5. Verify the data.

Recovering after SQL Server database detachment

When the SQL Server database is detached, you can use the following steps to restore data :

Step 1: Reconnect the database file

• Open SQL Server Management Studio (SSMS).
• Right-click the database you want to restore and select "Attach".
• Browse to the location of the database files (.mdf and .ldf).
• Select "Attach".

Step 2: Restore Log Files

• Once the database is successfully attached, right-click on the database and select Restore.
• In the "Select Restore Source" dialog box, select "Device".
• Browse to the location of the transaction log file (.ldf).
• Select the file and click OK.

Step 3: Restore data

• In the "Restore Database" dialog box, select "Database".
• Select the database name when detaching from the drop-down list.
• Select the "Recover to" tab.
• Enter the recovery point or time in the "Recover to" field.
• Click "OK" to start the recovery process.

Step 4: Check the database

• After the recovery process is complete, right-click the database and select Properties.
• Go to the Files tab and verify that the database and log files were successfully attached.
• Go to the "Status" tab and confirm that the status of the database is "Restored".

Step 5: Verify the data

• Verify that the data has been successfully recovered by querying the tables and data in the database.
• Run the following query to check data integrity:

<code class="sql">DBCC CHECKDB</code>

Tip:

• Before performing the recovery operation, make sure You have backups of your database and log files.
• If the detachment is caused by data corruption, you may not be able to fully recover the data.
• Some data types (such as FILESTREAM) may not be recovered from a detached database.

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