Hi!
below is simple php code

$dg = new C_DataGrid("SELECT * FROM test", "t_id", "test");
$sdg = new C_DataGrid("SELECT t2_id, t2_v1,t2_v2 FROM test2", "?", "test2");
$dg-set_subgrid($sdg, '?','t_id');
$dg-display();

Is it possible to show the data of 'test2' that the 't_id' of 'test' exist
either in column 't2_v1' and 't2_v2'??
so i don't know put which parameter into the question mark position???