How to execute sql file at SQL Server command line

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You can use sqlcmd to run a Transact-SQL script file. A Transact-SQL script file is a text file that can contain a combination of Transact-SQL statements, sqlcmdcommands, and scripting variables.

To run the script file
1.Open a command prompt window.
2.In the Command Prompt window, type:

sqlcmd -S myServer\instanceName -i C:\myScript.sql

3.Press ENTER.

More information, see http://technet.microsoft.com/en-us/library/ms170572.aspx