The following query kills the processes accessing the database: Assume that you have a database that is in single-user mode in Microsoft SQL Server 2014 and 2016. There was a question on Stack Overflow recently about SQL Server being "stuck" in single user mode. When I attempted to log in via the SQL management console, it said that the database was in single-user mode and my account was already connected. To restore the master database, we need to start SQL in single user mode. Users must remember that they can face some data loss during this repairing process. So you needed to put a DB in single_user mode but then some process comes along and grabs the connection out from under you. The fix … Continue reading "SQL: SQL Server database stuck in single user mode" If the transaction log is corrupt, it is the best practice to set database to emergency mode. Restore database master from disk= 'C:\Temp\Master_one.bak' with replace. Now take the backup of that user database (master_one) and then restored it in master using the below command. As an Admin, I too would love a way to disable the user from entering single user mode. It's very tiny and often overlooked. Which meant I wasn’t able to get exclusive use of the database which is required to do an ALTER DATABASE to set it back into MULTI_USER. I had this happen to me and I sure felt helpless. During maintenance actions, databases are set to Single-use Mode, so that only one user can access the database at a time (this is the case with master databases). When the SQL Server database is in suspect mode, the emergency mode helps to deal with the database. Many times a user will open QB in SU mode, often times unknowingly as the "open file in multi user mode" box when opening the file isn't checked. A database was stuck in single user mode. ALTER DATABASE database_name SET SINGLE_USER WITH ROLLBACK IMMEDIATE GO DBCC CHECKDB(database_name,REPAIR_ALLOW_DATA_LOSS) GO. 4. For e.g. How exactly was it stuck you ask? Well, 4-5 system sessions were holding locks on the database (and blocking each other). In this video you will learn how to bring database from Single User mode to Multi User mode using SQL Server Management studio as well as using T-SQL Script. In this article, we will show how to solve when database in emergency mode gets stuck and becomes inaccesible, eventually. Msg 5069, Level 16, State 1, Line 1 ALTER DATABASE statement failed. As an example I set my local AdventureWorks2012 database to single user mode, opened a session to that database, tried an alter database to get it back to multi user … You may notice that multiple deadlocks will occur simultaneously when many connections try to access the database. In order to do that, the database should be turned into single user mode. Switch the Database Back to Multi-User Now, your job is to get them out of the database and THEN go to multi-user mode. After that, I was not able to access the database instance using SQL Management console with my account. Because of this, the deadlocks keep occurring even after you exit all the connections. In short, you need to find their SPID and kill it before changing to multi-user mode. Once they followed the above steps, the master database was back to multi user mode. DATABASE IS STUCK IN SINGLE_USER MODE!!!!! You will learn a scenario where you will put database in single user mode and then bring database in multi User mode so that all the users can access the database. Different methods can be used to set a database to Single-user Mode. If your database is stuck in a single-user mode, the reason is because there is a single-user connected already who got there before you did. 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