In the Services window, locate the SQL Server instance service that you want to start in single user mode. For example, you may want to change server configuration options or recover a damaged master database or other system database. Start SQL Server in single user mode command prompt is a must know task for any SQL server DBA. In this article we will take a look at steps which one needs to follow to start SQL Server with Minimal Configuration to troubleshoot SQL Server configuration issues. You must start an instance of SQL Server in single-user mode when you use DBCC CHECKDB/CHECKTABLE with REPAIR options Summary. You are working as SQL Server DBA or SQL Server Developer and you are asked to provide scripts which can change the databases mode from single user to multi user. Many DBA’s might have a situation like restoring a master database or other system databases from the backup that needs SQL Server to be started in single user mode. Please refer to the below list for other SQL Server versions: You can also open it by clicking on start and search for SQL Server Configuration Manager as shown in the below image and click on SQL Server Configuration Manager (version) to open it. SQL Server will start in single user mode. There are certain situation when user wants to start SQL Server Engine in “single user” mode from the start up. The following example starts the SQL Server instance in single-user mode and only allows connection through the SQL Server Management Studio Query Editor. Add the -m to startup parameters, start an instance of SQL Server in a single-user mode. In SQL Server 2014 or 2012, click Startup Parameters tab. Rebuild the system databases, restart SQL Server in single user mode and restore the backups of all the system databases. This is useful if the setting of a configuration value (for example, over-committing memory) has prevented the server from starting. Got questions? Add –m in the sql server start up parameter to start SQL Server in Single User Mode. There are certain situation when user wants to start SQL Server Engine in “single user” mode from the start up. Model database files missing, inaccessible or corrupt. The correct way to run a DBCC CHECKDB or DBCC CHECKTABLE statement with valid REPAIR options is to start SQL Server normally and then explicitly set the database in single user mode. Replace it with yours: Enter Y to continue by stopping the SQL Server Agent service as shown in the below image: Once the services are stopped successfully, start the SQL Server service by passing m parameter. We can start up a SQL Server 2008 database in single-user mode by using either the graphical SQL Server Management Studio (SSMS) tool or by issuing Transact-SQL (T-SQL) statements. Mine is : Both actions require starting an instance of SQL Server in single-user mode. To start SQL Server in single user mode is very simple procedure as displayed below. Here is what I found, in SQL 2000 it was possible to do the backups(in single user mode) while the SQL 2005 server fails to accept the connection for backup (the same code/binary SQL-DMO statements are used for both). Similarly, SQL Server Management Studio can be used for SQL Server 2005 for changing a database to single user mode or to multi user mode. It is advisable to use SQLCMD when you want to query SQL Server that is started in single user mode as connecting directly and query using SQL Server Management Studio that uses more than one connection. Restart the SQL Server service to start SQL Server in single user mode. On Linux, SQLCMD must be capitalized as shown. Start the SQL Server Service instance. We can start up a SQL Server 2008 database in single-user mode by using either the graphical SQL Server Management Studio (SSMS) tool or by issuing Transact-SQL (T-SQL) statements. Type cmd and press enter button that opens the Command Prompt. Open SQL Server 2014 Configuration Manager. Use this code to abort all existing connections before attempting to restore. Click on Services which will open Services window. Now, let’s move to the restoring process and know how one can restore the database. I am using the -m parameter in startup parameter and it seems it is working fine. Enable Remote Admin Connection using sp_configure so a dedicated connection can be made when SQL Server Start in single user mode. You may receive login failed error as shown in the below image. Select the SQL Server service of the instance that you want to start in single user mode. We use cookies and similar technologies to give you a better experience, improve performance, analyze traffic, and to personalize content. How to start SQL Server in minimal configuration mode? In the former case, log into SSMS as an administrator, right-click the database in question, and select Properties from the shortcut menu. 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