For e.g. 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. As an Admin, I too would love a way to disable the user from entering 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. 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 … Switch the Database Back to Multi-User Because of this, the deadlocks keep occurring even after you exit all the connections. It's very tiny and often overlooked. If the transaction log is corrupt, it is the best practice to set database to emergency mode. : ALTER DATABASE command can be used with different switches to put a database in a single user mode: There was a question on Stack Overflow recently about SQL Server being "stuck" in single user mode. The fix … Continue reading "SQL: SQL Server database stuck in single user mode" 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. Now take the backup of that user database (master_one) and then restored it in master using the below command. 4. In order to do that, the database should be turned into single user mode. 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). Msg 5069, Level 16, State 1, Line 1 ALTER DATABASE statement failed. DATABASE IS STUCK IN SINGLE_USER MODE!!!!! To restore the master database, we need to start SQL in single user mode. The following query kills the processes accessing the database: Well, 4-5 system sessions were holding locks on the database (and blocking each other). How exactly was it stuck you ask? Lucky for me, I was able to use the SQL Management console with the Administrator account. A database was stuck in single user mode. The poster had a SQL Server 2016 instance, running on Windows Server 2016. In short, you need to find their SPID and kill it before changing to multi-user mode. Assume that you have a database that is in single-user mode in Microsoft SQL Server 2014 and 2016. ALTER DATABASE database_name SET SINGLE_USER WITH ROLLBACK IMMEDIATE GO DBCC CHECKDB(database_name,REPAIR_ALLOW_DATA_LOSS) GO. Users must remember that they can face some data loss during this repairing process. He said he tried to do this: ALTER DATABASE MyDatabase SET MULTI_USER; But it always told him that the database is in use. 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. The database is in single-user mode, and a user is currently connected to it. When the SQL Server database is in suspect mode, the emergency mode helps to deal with the database. Restore database master from disk= 'C:\Temp\Master_one.bak' with replace. 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. 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. 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. Simply speaking, it means that the database is in single user mode and you can’t seem to get it back into multi user mode. 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