How to Alter a SQL Server Database as Single User Mode and as Multi User Mode
Posted by Jugal Shah on March 25, 2009
You can use the SQL Server Enterprise Manager for SQL Server 2000 to set a database to a single user mode or to multi user mode. 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. Also you can alter the database access mode by using sql commands like ALTER DATABASE and sp_dboption.
ALTER DATABASE [MyDBName] SET MULTI_USER WITH NO_WAIT
ALTER DATABASE [MyDBName] SET SINGLE_USER WITH NO_WAIT
or
EXEC sp_dboption ‘MyDBName’, ‘single user’, ‘false’
EXEC sp_dboption ‘MyDBName’, ‘single user’, ‘true’



