Oracle APEX Classic Report Break Formatting

Question

I created a classic report. Under report attributes I defined Break Formatting as "First, Second and Third Column".
The data columns for this report are Domain, Discipline, TechnologyArea and Products.
Domain is the parent. Discipline is a child of domain. TechnologyArea is the child of Discipline. Products are children of TechnologyAreas.
Domain prints in the first column, Discipline in the second, TechnologyArea in the third and Product in the fourth. There are one to many products for any TechnologyArea - and one to many TechnologyAreas for any Discipline - and one to many Disciplines for any Domain. The report is sorted on Domain, Discipline, TechnolgyArea and Product. Therefore domain prints over and over and over. Discipline prints over and over until it changes. TechnologyArea prints several times before it changes. I don't like that.
I want the report to print Domain and not print it again until it changes. I want it to do the save for Discipline and TechnologyArea.
I set break formatting to "First, Second and Thrid Column". Now Domain prints once and does not print again until it changes. So far so good! Now Discipline prints once and does not print on subsequent rows until the discipline changes. So far so good! The TechnologyArea name prints on every row. That's not good.
Given this pattern, if there were an option for First, Second, Third and Fourth columns I think that would give me the report I want - but there's not. Can anyone tell me how to stop TechnologyArea from repeating on every row?

Answer 1

This look about right?
notice the last two records in the with statement are duplicates.
with test_data as(
    select 'MAMMAL' domain, 'DOG' discepline, 'BEAGLE' technologyArea, 'SQUEEKY TOY' product from dual union all
    select 'MAMMAL',  'DOG' ,   'RETRIEVER', 'SQUEEKY TOY' from dual union all
    select 'MAMMAL',  'CAT' ,   'LION',      'SQUEEKY TOY'  from dual union all
    select 'MAMMAL',  'CAT' ,   'CHEETAH',   'SQUEEKY TOY'  from dual union all
    select 'MAMMAL',  'DOG' ,   'DINGO',     'SQUEEKY TOY'  from dual union all
    select 'REPTILE', 'LIZARD', 'IGUANA',    'LARGE ROCK' from dual union all
    select 'REPTILE', 'LIZARD', 'GUILLA MONSTER', 'LARGE ROCK' from dual union all
    select 'REPTILE', 'SNAKE',  'CORAL',     'LARGE ROCK' from dual union all
    select 'REPTILE', 'SNAKE',  'PYTHON',    'LARGE ROCK' from dual union all
    select 'REPTILE', 'SNAKE',  'KING',      'LARGE ROCK' from dual union all
    select 'MAMMAL',  'DOG' ,   'BEAGLE',    'BONE' from dual union all
    select 'MAMMAL',  'DOG' ,   'RETRIEVER', 'BONE' from dual union all
    select 'MAMMAL',  'CAT' ,   'LION',      'BONE' from dual union all
    select 'MAMMAL',  'DOG' ,   'DINGO',     'BONE'  from dual union all
    select 'REPTILE', 'LIZARD', 'IGUANA',    'HEAT LAMP' from dual union all
    select 'REPTILE', 'LIZARD', 'GUILLA MONSTER', 'HEAT LAMP' from dual union all
    select 'REPTILE', 'SNAKE',  'CORAL',     'HEAT LAMP' from dual union all
    select 'REPTILE', 'SNAKE',  'PYTHON',    'HEAT LAMP' from dual union all
    select 'REPTILE', 'SNAKE',  'KING',      'HEAT LAMP' from dual union all
    select 'MAMMAL',  'CAT' ,   'CHEETAH',   'BONE' from dual union all
    select 'MAMMAL',  'CAT' ,   'CHEETAH',   'BONE' from dual
select * from(
select
    case when domain         != nvl(domain_lag,        ':START:') then domain         else null end as domain,
    case when discepline     != nvl(discepline_lag,    ':START:') then discepline     else null end as discepline,
    case when technologyarea != nvl(technologyarea_lag,':START:') then technologyarea else null end as technologyarea,
    case when product        != nvl(product_lag,       ':START:') then product        else null end as product
from(
    select domain, discepline, technologyarea, product,
           lag(domain,1)         over(order by domain, discepline, technologyarea, product) domain_lag,
           lag(discepline,1)     over(order by domain, discepline, technologyarea, product) discepline_lag,
           lag(technologyarea,1) over(order by domain, discepline, technologyarea, product) technologyarea_lag,
           lag(product,1)        over(order by domain, discepline, technologyarea, product) product_lag
      from test_data
     order by domain, discepline, technologyarea, product)
where coalesce(product, technologyarea, discepline, domain) is not null
edit
I did not understand the question properly before submitting this. Here it is anyway.
Cheers,
Tyson Jouglet
Edited by: Tyson Jouglet on Jan 26, 2011 2:42 PM