title: access 2010 how to check if yes/no field is checked
body: <p>I keep getting this error:</p>
  
  <blockquote>
    <p>Call to a member function fetch() on a non-object</p>
  </blockquote>
  
  <p>With this sql statement:</p>
  
  <pre><code>SELECT CD_BAN 
              FROM Tbl_Clients
              WHERE EXISTS = Yes
  </code></pre>
  
  <p>EXIST is a yes/no field..</p>
  
  <p>I am using php </p>