Help writing an SQL Script

select a.section,a.user,count(b.number),null from table a, table b
where.........
group by a.section,a.user
union
select a.section,a.user,null,count(c.number) from table a, table c
where .......
group by a.section, a.user

The output looks like this:-

Section       User        col A   col b


-------       ----        -----   -----


section 1     user A        22     0
                            0      12

section 2     user d        10     0
                            0      9

I want the output to look like this:-