title: Evaluating GETDATE twice in a statement - will it always evaluate to be the same?
body: <p>suppose</p>
  
  <pre><code>isnull(some_column, getdate()) &gt;= getdate()
  </code></pre>
  
  <p>where logic is if some_column is null this expression should always be true. However will this always be so (since between two evaluations of getdate() some time has passed and they won't be equal) ?</p>