In Dynamic Lists, users can use Computed Columns. Computed columns allow users to extend the list of columns by fields which do not exist in the source but which can be constructed from existing fields. Computed Columns are based on SQL.
In /fileserver/etc/dynamiclists/computedcolumn.cf you can specify which SQL functions can be used with Computed Columns.
Add those functions that may be used by your users.
Note that SQL functions vary depending on the database system.
We strongly recommend against allowing to use functions that can change data. Further, the database user used for report execution should not have write access.
In ReportServer Enterprise Edition you can change how the PDF and HTML output of a dynamic list is outlined. Further information on this can be found in the Administration Guide.