title: Min time stamp partition by same value in column
body: <p>I have a below dataset where I'm trying to get the min timestamp of the same values in a single column.</p>
  <p>Here is my dataset.</p>
  <p><a href="https://i.stack.imgur.com/l17C3.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/l17C3.png" alt="enter image description here" /></a></p>
  <p>I am trying to create a column to find user_first_comment for each interaction with dealer.</p>
  <p>like below</p>
  <p>is there any technique that i can use to add a incremental value for same values in columns.
  for example column RANK_Incremental,so that i can use Min wit hpartition to get final output.</p>
  <p><a href="https://i.stack.imgur.com/zW0Df.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/zW0Df.png" alt="enter image description here" /></a></p>