Why my query return null
<p>I want to ask why query return null and not update what i want. Sorry I'm still new with <code>asp.net</code> and <code>c#</code></p>

<pre><code>myquery = "UPDATE kenderaan SET buatan = " + "'" + carmake + "'" + "," +
          "model = " + "'" + carmodel + "'" + "," +
          "no_enjin = " + "'" + carenjin + "'" + "," +
          "cc = " + carcc + "," +
          "seatCapacity = " + carseat + "," +
          "tahunBuatan = " + caryear + " WHERE no_kenderaan = " + "'" + carid + "'" + "," +
          "AND ic = " + "'" + cusid + "'";


connection = new DbConnection();
connection.Update(myquery);
</code></pre>
