add only load?

[#1]

This code

"add only load *;

select

     lastname

     firstName

from

     customer"

What does "add only load" means and what is the purpose of using it?

[Jason_Michaelides · Accepted solution]

DV has done a great blog post on partial loads.  "Add" is covered in part 1 - http://qlikshare.com/370

Hope this helps,

Jason