Grouped reports typically display both the group header and the group footer. But what if you only need to output the group footer without displaying the group header?

If you want to create a grouped report, you need to use the group header band, but if you don't want it to be visible, you can hide it by setting the height of the group header band to 0. In this case, the report renders successfully, but the group header band does not appear in the output.