Powershell script to put database in single user mode in SQL Server. I tried killing a SPID (sp_who2) that I thought had the lock but could not get access to the database and I could not bring the database to muti-user mode. Reason: Server is 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. After rebuilding the master database, I went into setup again to add the "-m" server option to start server in single user mode so I can load the master database from backup. After that, I was not able to access the database instance using SQL Management console with my account. On the restore form, click Advanced button. This check box sets the database to single user mode before performing the restore operations, and sets the database to multi-user mode when complete. However, I’ve another instance of SQL Server 2016 and I also tried to restore master database as a user database (master_test) but it’s not being restore there as well. After the restore has completed the database will be returned to multi-user mode. 1. Know-How to Restore SQL Database From Backups In Single User Mode . I logged in through DAC. Here are the steps to follow to Restore SQL database from backups. Then I went into Enterprise Manager to start the server. Prompt Specifies that after each backup is restored, the Continue with Restore dialog box will be displayed to inquire whether you want to continue the restore … On the Advanced Form, click Options tab and then you should see the "Drop Connections to Database" option. Or, disconnect all the users by restarting the SQL Server service. If you want to use MMC when the SQL Server instance is in single-user mode, you must use the command-line interface, tdpsqlc.exe, to restore the master database. I logged on as sa, but I could not bring the database to muti-user mode. Microsoft Management Console (MMC) cannot connect to a SQL Server instance that is started in single-user mode. Moreover, I also tried to fix it from the setup bootstrap but it was also not working. If the database already exists in the instance, the database needs to be set to single user mode to prevent other users connects to it. But, the system doesn’t let me start the server in single user mode. Problem: I came across a situation where I have to put a DB in single user mode. NOTE: The SQL Server Agent and SQL Server VSS Writer services can cause the restore to fail and should be stopped after SQL Server is started in single-user mode. You can disconnect active users by closing the existing connections or by changing from multiple-user mode to single-user mode. In the above scenario, Windows Application log will show event ID 18461: Login failed for user ' '. I had a similar problem when the Query Tab for the single user got closed accidently. Note: Before moving to the restoring process, The user has to put the SQL database in single-user mode. 3. Lucky for me, I was able to use the SQL Management console with the Administrator account. This blog explained how to fix the SQL database restore failed, database in use problem. 1. What transactions do you want to be able to run after you set the database to single user mode? After the database is in single user mode, you can then run the DBCC CHECKDB or DBCC CHECKTABLE statements with the valid REPAIR options. If you are using SQL Server 2005 For more information about how to start SQL Server in single-user mode, visit the following Microsoft Developer Network (MSDN) Web site: Databases are set to single-user mode because so that only when the user can access the database at a time. This will actually run an ALTER DATABASE statement prior to restoring to switch the DB to single user. 2. 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