title: Convert epoch time to human readable time in google analytics
body: <p>I am running the below query in google analytics to convert a epoch timestamp to human readable form</p>
  <pre><code>select DATEADD(s, doj, '19700101')
  from employee
  where emp_id is not null 
  </code></pre>
  <p>Where <code>doj</code> is the column name with epoch value</p>
  <p>But the query is failing with:</p>
  <blockquote>
  <p>function not found: DATEADD</p>
  </blockquote>