My question basically, I use the classification HS1996, and I want to get the total bilateral exports(but excluding the oil exports, which is coded as 27 in this classification). So basically I need (total export-oil export). Since I am looking for the whole pairs in the world, it is easier to find it from your website than going through subtracting each oil exports from each pair by excel.

You need to create, in your favorites commodity groups, a new entry with

the equation ( total - 27 ) and use it in express selection which will

give you total trade minus oil as 1 record.

This link should be of help:

http://comtrade.un.org/db/help/FeaturesList.aspx