SQL Server 2008 R2 Stuck in Single User Mode

Question

Having executed a DB deploy (from a VS SQL Server database project) on a local database, which failed, the database has been left in a state where it has single user mode left o

Answer 1

In first run following query in master database

exec sp_who

If you can't find the culprit, try

SELECT request_session_id FROM sys.dm_tran_locks 
WHERE resource_database_id = DB_ID('YourDatabase')

Then kill all process that use your database with following query:

KILL spid

Then run following query:

USE Master
ALTER DATABASE YourDatabase SET MULTI_USER