How to repair SQL server database files

SQL database can be a subject of corruption due to many reasons like bad sectors in the disk, unexpected system shut down, virus corruption, media corruption, software malfunction or unrecognized database formation. Your database goes in suspect mode and server won’t allow you to perform any operation on that database until the database is repaired. MDF files are used to store data in SQL (Structured Query Language) databases. You need to repair SQL server by repairing .mdf database files.

The exact reason of a database going into suspect mode can be found using the following query,

DBCC CHECKDB (‘YourDBname’) WITH NO_INFOMSGS, ALL_ERRORMSGS

Output of the above query will give the errors in the database.

To repair the database, run the following queries in Query Analyzer. Do remember to backup your database before proceeding as once repair process initiates, any actions performed by these queries can’t be undone.

EXEC sp_resetstatus ‘yourDBname’;
ALTER DATABASE yourDBname SET EMERGENCY
DBCC checkdb(‘yourDBname’)
ALTER DATABASE yourDBname SET SINGLE_USER WITH ROLLBACK IMMEDIATE
DBCC CheckDB (‘yourDBname’, REPAIR_ALLOW_DATA_LOSS)
ALTER DATABASE yourDBname SET MULTI_USER

If your SQL server database must be repaired but if the files are highly corrupted then this won’t be sufficient. You need a better and stronger approach to fix the database. Take help of third party tools to repair SQL database files. They effectively repair and extract data from the corrupt SQL database (.mdf). Have a look over the extensive features served by such tools.

• Creates script file(s) where the recovered files are saved.
• Recovers deleted records which are saved in a separate SQL script
• Recovers tables, triggers, views, and stored procedures
• Recovers primary keys, indexes, unique keys and foreign keys
• Recovers predefined defaults, default values, rules, checks, and user data types (default, rule, Allow null).

Repair SQL tool is an efficient product capable of all above mentioned tasks. The tool swiftly repairs the whole database and enlists the data in a tree like structure. You can select the required files as well as get back the deleted records. It supports MS SQL Server 2000, 2005, 2008 and 2008 R2. Download the free trial version to scan and check the potential of the software before going for the full version.