Altiris 7.1 data fields

Need help to run query that shows all data filed in SMP 7.1 . We have some custom fields that were added for reporting purpose and would like to capture those fields as well. What I'm trying to do is run query that shows all existing fields that are installed by default with 7.1 when it is installed without any customization and then get the custom fields that we developed using custom query.  I'm not sure how to do this since it is probably based on 7.1 Schema but it is very much needed and appreciate help on it. Thanks