title: sum in ms-access
body: <p>I have three fields</p>
  
  <blockquote>
    <p>field1 = number ,<br>
     field2 = number ,<br>
     field3 = number  </p>
  </blockquote>
  
  <p>Now how to take a sum ?</p>
  
  <p>For example :</p>
  
  <pre><code>field3 = sum(field1,field2)
  </code></pre>
  
  <p>or </p>
  
  <pre><code>Default Value = field1+field2
  </code></pre>