Not a valid database

1

hi,

I experience the problem with MDF format document. Its not opening.

Saying: Mdf is not a valid database file header. What's the problem? What should I do?

Please give me a solution soon as possible.

2

What exactly are you doing, and what is the exact error message?

4

it might be corruption in MDF header and you may getting SQL Server error 5172. Please take a look on here to know more about it: http://www.sqlrecoverytool.com/fix-ms-sql-server-error-5172.html

5

You don't open MDF files, you attach them to a SQL Server database instance.
Connection to server - database folder - click Attach- add
Take a look here: https://www.openfiletool.com/mdfopen.html

6

The message posted by the O/P is displayed as a result of trying to attach a file :yak: