I had SQL Server Express 2008, 2008 R2, and 2012 RC0 installed when I created an .mdf file. Now I cannot open it in 2008 R2. How can I check which version the file is, if I don’t have 2012 RC0 installed anymore?
I removed all SQL Server versions from the computer and reinstalled 2008 R2. Looking through other posts, I see that I probably should have "detached" the database file first, but I did not know that at the time.
How to determine the database version of an MDF file: