title: How to update database using OleDbDataAdapter with sql query?
body: <p>I have this code:</p>
  
  <pre><code>OleDbDataAdapter dataAdapter = new OleDbDataAdapter("SELECT col1, col2 "
                                                    + "FROM tab1", 
                                                      connection);
  </code></pre>
  
  <p>I want to be able to do like this:</p>
  
  <pre><code>dataAdapter.UpdateCommand = new OleDbCommand(
              "UPDATE tab1 SET col1 = col1*2, col2 = 300"
            + "WHERE col1 = 5", connection);
  </code></pre>
  
  <p>How to do this right ?</p>