I restored a backup of a database from SQL Server 2008 R2 to SQL Server 2012. When I try to access a particular page of my application, I get this error: > Cannot execute as the database principal because the principal "dbo" does not exist It works with my 2008 R2 project perfectly. How can I resolve this issue?
TopAnswers
Databases
Top Answer
Paul White
You need to give the database a valid owner. Use the [`ALTER AUTHORIZATION`][1] command to do this:
ALTER AUTHORIZATION
ON DATABASE::[DatabaseName]
TO [A Suitable Login];
[Related Knowledge Base article][2]
Note the [sp_changedbowner][3] system stored procedure has been deprecated in favour of `ALTER AUTHORIZATION`.
[1]: https://msdn.microsoft.com/en-us/library/ms187359(v=sql.105).aspx
[2]: https://support.microsoft.com/en-us/kb/913423
[3]: https://technet.microsoft.com/en-us/library/ms178630(v=sql.105).aspx