title: SQL - Get data based on months form a dateTime column
body: <p>With SQL Server, I have a column with a launch date (<code>dateTime</code>). I want to report on everything that is being launched between all of last month (from viewing date) thru all of this month and next month.  </p>
  
  <p>So basically a full 3 month period.  </p>
  
  <p>What is the best way to write that?</p>