title: DateAdd Column caused an overflow
body: <p>After executing the following query I am getting an error </p>
  
  <blockquote>
    <p>Adding a value to a 'datetime' column caused an overflow.</p>
  </blockquote>
  
  <p>I have no idea why this is happening as it worked smoothly for a couple of weeks.  I am just trying to ADD Dates here and compare them to the Start date and End date with a <code>between</code> clause.</p>
  
  <pre><code>DATEADD(day, -1 , DATEADD(mm, DATEDIFF(mm,0,posting_date),0)) BETWEEN start_date and end_date
  </code></pre>