title: Creating an Index Column for a Descriptive Data Using "DAX" in Power BI
body: <p>I have a table Like this,</p>
  
  <p><em>Table1</em></p>
  
  <pre><code>ColA   ColB
  Orange Apple
  Mango  Not Apple
  Mango  Not Apple
  </code></pre>
  
  <p>I want to create a column called as RowNumber using DAX and not Query Editor (M).</p>
  
  <p>So the Expected output is,</p>
  
  <pre><code>ColA     ColB        RowNumber
  Orange   Apple       1
  Mango    Not Apple   2
  Mango    Not Apple   3
  </code></pre>
  
  <p>This can be done in M - Power Query Side. </p>
  
  <p>But, I am looking for a solution using DAX- Calculated Column. </p>
  
  <p>I expected functions like RowNumber (T-SQL) or Index to be present inside DAX.</p>