SQL
Server is a relational database management system developed by
Microsoft. The database server is a software product with the primary
function of storing and retrieving data. It supports MDF, NDF and LDF
files for storing data. The MDF file is the primary database file,
the NDF file is the secondary file, and the LDF file is the log file. Microsoft always recommends that users back up the SQL
Server database from time to time for easy recovery in the event of
data loss or corruption. If users have a backup, they can easily
restore their data. But what to do if users have no backup? This blog
describes the best techniques of how to recover SQL Server database
without backup using a manual and automated approach.
Reasons Behind SQL Database Corruption
There
are various reasons that cause SQL Server Database corruption. In the
following section, we mentioned some of the reasons:-
-
Saving the SQL database in compressed folders
-
Storage media corruption where MDF files are stored
-
Accidental deletion of data
-
File header corruption
-
Errors in the disk drivers
-
Hard drive failure
-
Sudden power failure
-
Abrupt system shutdown
-
Virus attack
How to Recover SQL Server Database without Backup?
There
are two options that allow you to recover data from corrupt SQL
server database files, one is manual and second is a third-party tool.
Here, we will show you step by step process to repair MDF file and NDF
files which are corrupted. Follow the methods described in the
following section to complete this task.
#Method 1: Recover Corrupt SQL Database via Manually
In
order to recover a corrupted database, Microsoft provide the inbuilt
utility. DBCC CHECKDB is a command used to check the integrity of SQL database objects and to perform an SQL recovery. There are
several DBCC CHECKDB commands that are helpful for a specific purpose.
Here are the commands to fix and recover data from corrupt SQL Server
Database.
-
DBCC CHECKTABLE (‘TABLE_NAME’) :- Use this command on the command line or in the Query Manager to recover corrupted database table.
-
DBCC CHECKDB (‘DATABASE_NAME’) :- Check the entire database for repair at the command line or in the Query Manager.
-
REPAIR_ALLOW_DATA_LOSS :- Use this command to repair the data by allocation and deallocation rows. This command removes corrupted text, line errors, page faults, and column errors.
-
REPAIR_FAST :- This is another command used for the repair process because of the name indicates that repairing the data takes less time, but makes only minor changes.
#Method 2: Recover SQL Server Database Without Backup via SQL Recovery Tool
Sometimes,
the DBCC CHECKDB command can not recover corrupt SQL database and
requires extensive technical knowledge to successfully complete this
task. Running multiple SQL Server MDF files takes a long time.
Overall, the manual method works only if you are professional and
have good knowledge of SQL Server, otherwise, it is very tedious. To
make this task simple and quick, you can use the SysTools SQL Database Recovery Tool. This is a perfect solution to recover data from corrupt SQL
Server database. It can easily recover MDF and NDF files with all
items like tables, triggers, functions, stored procedure and more.
The best feature of this tool is that it supports all versions of
Microsoft SQL Server like SQL Server 2017, 2016, 2014, 2012, 2008,
etc.
Process
to Recover Corrupt SQL Database Using SQL Recovery Software
Here
are the simple steps to repair and recover MDF and NDF database files
which got corrupted:-
Step
1. Download, install and run the software to recover SQL Server
database without backup.
Step
2. Click on the Open tab and add corrupt MDF file.
Step
3. Check the Quick Scan or Advance Scan boxes as per the need. Select
the version of SQL Server .mdf file version.
Step
4. Once the scanning process is completed, the software will display
a preview of all recovered database items. Click the Export option
from the top to export recovered data.
Step
5. Select the Export Options between SQL Server Database and SQL
Server Compatible SQL Scripts. Enter the required SQL Server
credentials.
Step
6. Choose export with only schema or export with schema & data as
per your requirement. In the end, click on the Export button.
Once
the export process is done, you can view the recovered database by
expanding the databases in SQL Server.
Final Words
Microsoft
SQL Server is the most sophisticated database management system for
storing and retrieving data. In this case, corruption of the SQL
Server database can lead to difficult situations for users. That's
why, in the above blog, we discussed the two best techniques to
recover SQL Server database
without backup. The manual solution is tedious, requires sound
technical knowledge, and does not successfully restore SQL Server database. To solve all these problems, it is recommended to
choose a professional solution.
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