SQL DATABASE CORRUPTION AND ITS RECOVERY
SQL server is widely used database management platform for handling the large and important databases of organization. But this large database management system is not immune to corruption that will leads to the loss of important database. Database corruption here means that due to some reasons such as inaccurate page indexing or can say inaccurate storage of the zeroes and ones at the IO sub-system level or disk level the database become inaccessible. These zeros and ones are needed to store the databases or can say justify the address of the database.
Cause of Database Corruption
Maximum time the database corruption occurs due to I/O subsystem level problems. These I/O subsystem level problems are associated with problems in drives, drivers or controller, because dealing with magnetic storage is problem. In this offset value of page containing index is being altered inaccurately causing errors at the time of access.Nevertheless, it is not like that only I/O subsystem failures cause database corruption.
Solutions to Fix the Corruption
Mostly, when corruption in SQL database is detected SQL professionals take some measures to resolve this damage. By using SQL Server Management Studio this damage can be solved, follow the below listed steps:-
1.Go to SQL Server Management Studio and open it.
2.Open a new query page by clicking on new query button.
3.Type the below query in the new query page and execute it.
EXEC sp_resetstatus [Database_Name];
ALTER DATABASE [Database_Name] SET EMERGENCY
DBCC checkdb ([Database_Name])
ALTER DATABASE [Database_Name] SET SINGLE_USER WITH ROLLBACK IMMEDIATE
DBCC DATABASE ([Database_Name], REPAIR_ALLOW_DATA_LOSS)
ALTER DATABASE [Database_Name] SET MULTI_USER
This solution will help but will not be able to recover database for high level of damage. So for this, user must go for third party tool which will surely recover the severely corrupted database file. SQL Recovery Tool a sure alternative or can say a solution which will recover and repair the corrupt database and also allows the export of the recovered database. The tool provide dual scan modes and many other such features which will help the user to recover the corrupt database more accurately.
The user can also have an experience that how efficiently the tool works by downloading the DEMO version. But the restriction is that the demo version only allows the recovery and preview of the database, to save the database and export it you need the paid version. For more details