title: How to do a SQL Server select using a timestamp minus a certain number of hours
body: <p>Right now I have a SQL query that allows me to select entries in a table that have been inserted over the past day.   </p>
  
  <p>The query is:</p>
  
  <pre><code>Select account from mytable where create_date &gt; current_timestamp - 1   
  </code></pre>
  
  <p>But suppose that I wanted to select entries that had been inserted over the base two hours?    </p>
  
  <p>How would I write that query?</p>