MDF is primary data file of SQL Server; if this file gets corrupt then you can’t access your important database. In this condition Microsoft SQL Server provides you DBCC CHECKDB command for checking the consistency error. If DBCC CHECKDB command failed to repair your corrupt database then you can restore your backup file. If you have no SQL Server BAK file then last option is third party tool such as SQL recovery software. This equipped with advanced technology that repairs corrupt SQL Server database and gives you 100% recovery result. For testing the ability of SQL database recovery tool, you can download free MDF viewer utility of this tool which allows users to repair & view the SQL MDF database. If you want to export the recovered MDF file to SQL Server or your local machine, you have to Buy SQL database recovery software at $129 for single machine. Read more: http://recover-sql-server-database.weebly.com/