title: Azure node.js functions to update/retrieve an entity in azure table storage
body: <p>How to update Azure node.js functions to update/retrieve an entity in azure table storage . Only method I found in functions is for inserting an entry.
  So how can the table be queried/updated?</p>
  
  <p>The task is to simpy retrieve data on the basis of rowkey and partition key and then increment the value of key value pair stored as <code>{"num":val}</code>.</p>