title: SQLCMD variables and SSDT schema compare issue
body: <p>I want the comparison below to not show a difference. According to <a href="http://msdn.microsoft.com/en-us/library/aa833435%28v=vs.100%29.aspx" rel="noreferrer">MSDN</a>
  (see step 7), there should be a <strong>SQLCMD Variables</strong> function available which I cannot find. This documentation is for SQL 2010, but I am using 2012. There doesn't appear to be 2012 version of the documentation available on this page.</p>
  
  <p>How can I specify the value of <code>$(DatabaseName)</code> so that this comparison will work? I already have the value specified in my database project settings.</p>
  
  <p><img src="https://i.stack.imgur.com/uXGJ8.png" alt="SQL Schema Compare"></p>