My last blog was about how to improve performance if you are NAV warehouse system. In my solution I used a sql script that summarizes the warehouse Entry table by Item,Variant,zone,bin,lot,serial,UOM and inserts the data into a new 50K range table and then a nav processing reports deletes all the warehouse entry and inserts the summarized entries into warehouse entry. In NAV 2013, MS has proved a new object type Query for C/Side Developers.