title: How to filter a data table for rows with the latest timestamp in R
body: <p>I have a datatable of 48 rows, extracted from database via a SQL query.</p>
  
  <p>I want to filter for the latest timestamp within this dataset.</p>
  
  <p>Does anyone know how to do this please?</p>
  
  <p>Many thanks!</p>
  
  <p>table is attached for clarity:
  <a href="https://i.stack.imgur.com/S6TF2.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/S6TF2.png" alt="enter image description here"></a></p>