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How to Recover a SQL Server Database That Is Corrupt

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How to Recover a SQL Server Database That Is Corrupt

In this article, we will see how to solve the problem to restore a SQL Server Database that is corrupt.

· Database Zone ·
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In this article, we will see how to solve the problem to restore a SQL Server Database that is corrupt. To solve the problem, we will use a special software.

The software name is Kernel for SQL Database Recovery and you can download the software here:

The installer is small and very intuitive. The wizard is simple and it will take you few minutes to download and install:

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Once installed, you will be able to browse your data file. The Data file in SQL Server contains the data of the database. The extension is MDF and it is usually stored in the program files\Microsoft SQL Server\MSSQL.MSSQLSERVER\MSSQL\DATA folder.

Options to Recover the Corrupt Database

Make sure to stop your SQL Server service. You can stop the service by using the SQL Server Management Studio or the services.msc. The service has to be stopped to restore the MDF file. Otherwise, you will receive a message saying that the file is in use.

There are two recovery modes. The first option is to use the Standard Scan. This option is faster, but if your database is big, it can generate out of memory errors because it works on memory.

The second option is the advanced scan. This process is slower, but it does not consume too much memory as the first option.

There are other options used here to detect the SQL Server version. Use the Auto detect database version by default and if you have problems to detect the version, you can select the SQL Server version manually:

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Select SQL Objects to Restore

Once selected the version and the scan type, you will have the list of SQL Server objects to restore. You can choose which objects you want to restore:

Finally, you can press the save icon to save the information:

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Once saved, you can save the data into a SQL Server database or a batch file.

Features of the Kernel SQL Database Recovery

  • It supports any SQL Server version like SQL Server 2017, 2016, 2014, 2012 or even lower versions.
  • It can restore any SQL object like tables, user data types, views, stored procedures, defaults, rules, triggers, and functions, etc.
  • The software can restore deleted rows.
  • It can create the restore commands in a script form.
  • Kernel SQL Database Recovery can recover UNICODE data.
  • Multiple mdf and ndf files can be recovered at the same time.
  • When the data is restored, all the structure is preserved.
  • The data restored can be restored into a SQL Server online.

System Requirements to Install Kernel SQL Data Recovery

The software can be installed in any SQL Server version starting on SQL 2000 until the last SQL Server version. Also, it supports any Windows operative system including Windows XP, Windows 7, 8 and 10.  In the Server versions, it supports Windows 2003 until Windows 2016.

Restoring Offline

This software does not require a live SQL Server to restore information. You just need the mdf (primary file) or ndf file (secondary file).

Other Options

In the Tools and Options menu, it is possible to save the tables without the identity property.

Trial Limitation

The trial version does not allow to save the information restored.

Database Size Limit

There is no limit for the SQL Server Database size. You can restore a TB, GB or MB database. 

Visualize the Data Before Repairing It

The tool allows visualizing the objects to be recovering before repairing the data. 

Possible Reasons to Have a Database Corrupted

The common reasons which lead to SQL database corruptions are:

  • Invalid database file header

  • Not able to associate database file with different databases

  • Internal Program Error(s)

  • Crash or failure of the hardware (hard drive especially)

  • Media contamination or damage

  • Accidental deletion of data and files

  • Accidental reformatting of partitions

  • Virus attacks (malware)

  • Data corruptions

  • Hacker attacks


In this article, we saw a powerful tool to restore a database. This software allows recovering a damaged and corrupted database when the software is damaged by a ransomware a hacker or a hardware failure. The software provides 2 options to scan the information and it is possible to select the objects to restore.


For more information, refer to the following links:

sql server recovery ,database ,kernel ,corrupt database recovery ,sql server ,tutorial

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