title: Sqoop Incremental Import
body: <p>Need advice on Sqoop Incremental Imports. 
  Say I have a Customer with Policy 1 on Day 1 and I imported those records in HDFS on Day 1 and I see them in Part Files.<br>
  On Day 2, the same customer adds Policy 2 and after the incremental import sqoop run, will we get only new records in the part files? 
  In that case, How do I get the Old and Incremental appended/last modified records using Sqoop?</p>