title: select distinct from dataset
body: <p>I have got duplicate rows in a dataset. how can i select distinct rows from that. </p>
  
  <p>From comments: My query is something like this:</p>
  
  <pre><code>select name, age 
  from student
  </code></pre>
  
  <p>When I receive its output in a dataset the output consists of rows having duplicate names. Using dataset itself I have to select distinct name from this because I need the same query with duplicate values for some other place.</p>