Auto running SQL script
The -S portion of the osql command tells osql where to find the SQL instance that you want to interact with. It typically consists of two parts -- the server name and the instance name.
You'll need to replace &quot;myserver&quot; with the name of the server that your SQL installation is running on. And, if your SQL installation is using a named instance, you'll need to replace &quot;sqlexpress&quot; with the name of that instance. If, on the other hand, you installed SQL as a default instance, you can leave out the part after the backslash.
Examples
I've got SQL running on a machine named DougSQL01. As a default instance. So my osql command would look like this:
osql -S DougSQL01 -E -i &quot;c:\test.sql&quot; -o &quot;c:\output.txt&quot;

I've got another instance of SQL running on another server, DougSQL02. This one is a named instance, with an instance name of &quot;Testing&quot;. In this case, my osql command would look like this:
osql -S DougSQL02\Testing -E -i &quot;c:\test.sql&quot; -o &quot;c:\output.txt&quot;

There are some other subtleties about how to specify a server and an instance, like specifying a port instead of an instance name, using an IP address instead of a hostname,  specifying &quot;mssqlserver&quot; for a default instance, and the ability to leave out the name of the instance if a named instance is running on port 1433, but none of them are likely to apply in your case.