Hi,
Thanks to share your post.
For the issue, do you mean that you want to customize the reports in the SharePoint? If yes, please try to use CAML (Collaborative Application Markup Language) queries
to achieve this.
The followed article is about how to use the CAML queries in the report:
http://dattard.blogspot.com/2008/01/custom-sharepoint-reports-using-caml.html.
http://msdn.microsoft.com/en-us/library/bb326214.aspx.
And here is how to use the CAML queries:
http://www.a2zdotnet.com/View.aspx?id=90.
And some applications on the CAML in the report:
http://blogs.msdn.com/b/ecm/archive/2006/11/15/report-rapport.aspx.
Hope this could help you!
Leo