title: How to update multiple columns of dynamo db using aws iot rules engine
body: <p>I have set of data: <code>id</code>, <code>name</code>, <code>height</code> and <code>weight</code>. </p>
  
  <p>I am sending this data to aws iot in json format. From there I need to update the respective columns in a dynamo db hence I have created 3 rules to update <code>name</code>, <code>height</code> and weight keeping <code>id</code> as partition key.</p>
  
  <p>But when I send the message only one column is getting updated. If I disable any 2 rules then the remaining rule works fine. Therefore every time I update, columns are getting overwritten. </p>
  
  <p>How can I update all three columns from the incoming message?</p>