SQL Server is a relational database management system which comes in several versions, such as: SQL Server 2000, 2005, 2008 & 2012. Any of these versions can easily be installed on a system in order to use it in an enterprise or professionally. The enterprise version is used in corporate houses while professional is used for personal usage. An SQL database stores a large amount of data and information as well as manages them in an accurate manner. There are lots of features associated with MS SQL files as compared to MS Access database. The MS SQL database can store large volume of data with advanced security features. Due to this advanced feature, only the DA (database administrator) contains the full access of the MDF file. An SQL Server can be shared online with live web applications for multiple users’ access via network. The front-end of web application is made fully functional with user interface controls. So that whatever changes are made through the web controls, are reflected in the database. Many dynamic e-commerce applications are based on RDBMS (Relational database management system) like SQL Server database. MS SQL generates files with MDF and LDF extensions. MDF files consist of data and information in the form of tables and other file objects, such as: views, triggers, stored procedures, keys, indexes, constraints, etc. which can be processed by SQL Queries. Whereas an LDF file provides all the information about the logs which are generated. Professionals like web developers, software developers and SQL administrators make back-end connections with front-end user interface. The MDF file is not immune to corruption. The MDF file may get damaged or corrupted due to virus infection and various other factors. To fix normal or minor corruption issues in MDF files, one can access some Database Console Commands, such as: DBCC in MS SQL Server to rectify the logical and physical integrity of the files. Additionally, one can use DBCC DBREPAIR and DBCC CHECKDB commands to fix the glitch, but only when the damage is not that severe. Some other factors which may cause corruption in SQL Server files are:Oversized MDF file, abrupt power failure or unexpected system shut down, etc. As the files get corrupted, you may lose all the stored database objects like tables, views, stored procedures and triggers. If the secured MDF File is corrupted and you are having no proper backup, you would be left with only one solution, a third-party recovery tool. There are various software companies in the market which provide reliable MS SQL File recovery programs. All these software programs come with free demo or trial versions which must be used for evaluation purpose.