How to log in to a named instance of SQL Server (Command Prompt) From SQL Server Setup Help previous page next page SQL Server Setup Help How to log in to a named instance of SQL Server (Command Prompt) To log in to a named instance of SQL Server From a command prompt, enter either: osql / U login_id /P password /S servername\instancename -or- isql/U login_id/P password /S servername\instancename previous page start next page