Some subDatasets in the same Crosstab

Hello everybody,

i habe a question to the subDatasets.

Is it possible to use 2 subDatasets for the same Crosstab? I need it, because i wand to do some sql-querys for the same Crosstab?

If not, how can i do some sql-querys for the same Crosstab? At the Jasper Reports  home page i did'nt find a  sample for my case.

Thank you!