title: Example of OrmLite UpdateOnly with Multiple Fields
body: <p>Is it possible to use the OrmLite extension method <strong>UpdateOnly</strong> to update multiple fields at once?</p>
  
  <p>The example given in the documentation is:</p>
  
  <pre><code>db.UpdateOnly(new Person { FirstName = "JJ" }, p =&gt; p.FirstName);
  </code></pre>
  
  <p>Can I provide an expression with multiple fields in it? If so, what's the best operator to use given that the fields may be different data types.</p>