title: Double curly braces on SET operation sql
body: <p>I have come across the following code:</p>
  
  <pre><code>Declare @prmFromDT Datetime;
  Declare @prmToDT Datetime;
  
  SET @prmFromDT = '{{ @StartTime }}';
  SET @prmToDT = '{{ @EndTime }}';
  </code></pre>
  
  <p>Why the parametres passed on the local variables are around double curly braces?</p>