Creating multirow table headers

Question

I have a table where my column headers are set with the following instruction :

table.setColumnHeader

I wonder how can I create multilevel

Answer 1

To make a header only of a table use setPageLength(0); this will eliminate the table body and show only the header. Then create another table with a header and your data and combine these 2 in a layout :) It's a cool trick, be sure to match the ratio's of first header with the second's table header.