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title Log In to an Instance of SQL Server (Command Prompt)
description Learn about the sqlcmd utility. See how to use it in a command prompt to test connectivity to an instance of SQL Server.
author rwestMSFT
ms.author randolphwest
ms.date 03/14/2017
ms.service sql
ms.subservice configuration
ms.topic conceptual
helpviewer_keywords
logins [SQL Server], named instance of SQL Server
log ins [SQL Server]
logins [SQL Server], default instance of SQL Server
command prompt [SQL Server], logins
logging in [SQL Server]

Log In to an Instance of SQL Server (Command Prompt)

[!INCLUDE SQL Server] This topic describes how to test connectivity to an instance of [!INCLUDEssNoVersion], use the sqlcmd utility.

To log in to the default instance of SQL Server

  1. From a command prompt, enter the following command to connect by using Windows Authentication:

    sqlcmd [ /E ] [ /S servername ]  
    
    

To log in to a named instance of SQL Server

  1. From a command prompt, enter the following command to connect by using Windows Authentication:

    sqlcmd [ /E ] /S servername\instancename  
    
    

See Also

sqlcmd Utility
osql Utility